Quantification of Anionic Redox Chemistry in a Prototype Na-Rich Layered Oxide

Hu, Yue; Liu, Tiefeng; Cheng, Chen; Yan, Yingying; Ding, Manling; Chan, Ting-Shan; Guo, Jinghua; Zhang, Liang

doi:10.1021/acsami.9b19204

Title: Quantification of Anionic Redox Chemistry in a Prototype Na-Rich Layered Oxide

Abstract

Harnessing anionic redox reactions is of prime importance for boosting the capacity of sodium-ion batteries (NIBs). However, quantifying the cyclability of anionic redox reactions is still challenging. Herein, we conduct a qualitative and quantitative investigation of the cationic and anionic redox reactions of a prototype Na-rich layered oxide, namely, Na₃RuO₄, by a combination of bulk-sensitive X-ray absorption spectroscopy and full-range mapping of resonant inelastic X-ray scattering. We unequivocally reveal that both Ru cations and oxygen anions are involved in the charge compensation process of Na₃RuO₄. Ru redox is highly reversible over extended electrochemical cycles, while the cyclability of lattice oxygen redox gradually decreases with the retention of only 36% after 30 cycles, which is mainly responsible for the capacity fading of Na₃RuO₄. Finally, our findings provide deeper insights into the complex oxygen redox mechanism, which plays a decisive role for designing high-energy Na-rich electrode materials for NIBs.

Authors:

Hu, Yue ^[1]; Liu, Tiefeng ^[2]; Cheng, Chen ^[1]; Yan, Yingying ^[1]; Ding, Manling ^[1]; Chan, Ting-Shan ^[3];

^[4];

^[1]

Soochow Univ., Jiangsu (China)
Zhejiang Univ. of Technology (China)
National Synchrotron Radiation Research Center, Hsinchu (Taiwan)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Univ. of California, Santa Cruz, CA (United States)

Publication Date:: Mon Dec 30 00:00:00 EST 2019

Research Org.:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES); National Natural Science Foundation of China (NSFC); Jiangsu Higher Education Institutions of China; Natural Science Foundation of Jiangsu Province

OSTI Identifier:: 1780734

Grant/Contract Number:: AC02-05CH11231; 11905154; 19KJA550004; BK20190814

Resource Type:: Accepted Manuscript

Journal Name:: ACS Applied Materials and Interfaces

Additional Journal Information:: Journal Volume: 12; Journal Issue: 3; Journal ID: ISSN 1944-8244

Publisher:: American Chemical Society (ACS)

Country of Publication:: United States

Language:: English

Subject:: 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Na-ion batteries; Na-rich layered oxide; oxygen redox; x-ray absorption; spectroscopy; resonant inelastic x-ray scattering

Citation Formats


                    Hu, Yue, Liu, Tiefeng, Cheng, Chen, Yan, Yingying, Ding, Manling, Chan, Ting-Shan, Guo, Jinghua, and Zhang, Liang. Quantification of Anionic Redox Chemistry in a Prototype Na-Rich Layered Oxide.  United States: N. p., 2019. 
Web.  doi:10.1021/acsami.9b19204.

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                    Hu, Yue, Liu, Tiefeng, Cheng, Chen, Yan, Yingying, Ding, Manling, Chan, Ting-Shan, Guo, Jinghua, & Zhang, Liang. Quantification of Anionic Redox Chemistry in a Prototype Na-Rich Layered Oxide.  United States.  https://doi.org/10.1021/acsami.9b19204

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                    Hu, Yue, Liu, Tiefeng, Cheng, Chen, Yan, Yingying, Ding, Manling, Chan, Ting-Shan, Guo, Jinghua, and Zhang, Liang. Mon .  
"Quantification of Anionic Redox Chemistry in a Prototype Na-Rich Layered Oxide".  United States.  https://doi.org/10.1021/acsami.9b19204.  https://www.osti.gov/servlets/purl/1780734.

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@article{osti_1780734,

  title        = {Quantification of Anionic Redox Chemistry in a Prototype Na-Rich Layered Oxide},

  author       = {Hu, Yue and Liu, Tiefeng and Cheng, Chen and Yan, Yingying and Ding, Manling and Chan, Ting-Shan and Guo, Jinghua and Zhang, Liang},

  abstractNote = {Harnessing anionic redox reactions is of prime importance for boosting the capacity of sodium-ion batteries (NIBs). However, quantifying the cyclability of anionic redox reactions is still challenging. Herein, we conduct a qualitative and quantitative investigation of the cationic and anionic redox reactions of a prototype Na-rich layered oxide, namely, Na3RuO4, by a combination of bulk-sensitive X-ray absorption spectroscopy and full-range mapping of resonant inelastic X-ray scattering. We unequivocally reveal that both Ru cations and oxygen anions are involved in the charge compensation process of Na3RuO4. Ru redox is highly reversible over extended electrochemical cycles, while the cyclability of lattice oxygen redox gradually decreases with the retention of only 36% after 30 cycles, which is mainly responsible for the capacity fading of Na3RuO4. Finally, our findings provide deeper insights into the complex oxygen redox mechanism, which plays a decisive role for designing high-energy Na-rich electrode materials for NIBs.},

  doi          = {10.1021/acsami.9b19204},

  journal      = {ACS Applied Materials and Interfaces},

  number       = 3,

  volume       = 12,

  place        = {United States},

  year         = {Mon Dec 30 00:00:00 EST 2019},

  month        = {Mon Dec 30 00:00:00 EST 2019}

}

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Works referenced in this record:

Reversible anionic redox chemistry in high-capacity layered-oxide electrodes
journal, July 2013

Sathiya, M.; Rousse, G.; Ramesha, K.
Nature Materials, Vol. 12, Issue 9
DOI: 10.1038/nmat3699

Direct Visualization of the Reversible O ²⁻ /O ⁻ Redox Process in Li-Rich Cathode Materials
journal, February 2018

Li, Xiang; Qiao, Yu; Guo, Shaohua
Advanced Materials, Vol. 30, Issue 14
DOI: 10.1002/adma.201705197

Fingerprint Oxygen Redox Reactions in Batteries through High-Efficiency Mapping of Resonant Inelastic X-ray Scattering
journal, January 2019

Wu, Jinpeng; Li, Qinghao; Sallis, Shawn
Condensed Matter, Vol. 4, Issue 1
DOI: 10.3390/condmat4010005

Energy and environmental nanotechnology in conductive paper and textiles
journal, January 2012

Hu, Liangbing; Cui, Yi
Energy & Environmental Science, Vol. 5, Issue 4
DOI: 10.1039/c2ee02414d

Electronic structure of ${Li}_{2} {RuO}_{3}$ studied by LDA and LDA+DMFT calculations and soft x-ray spectroscopy
journal, March 2015

Pchelkina, Z. V.; Pitman, A. L.; Moewes, A.
Physical Review B, Vol. 91, Issue 11
DOI: 10.1103/physrevb.91.115138

The application of synchrotron X-ray techniques to the study of rechargeable batteries
journal, November 2018

Gong, Zhengliang; Yang, Yong
Journal of Energy Chemistry, Vol. 27, Issue 6
DOI: 10.1016/j.jechem.2018.03.020

The structural and chemical origin of the oxygen redox activity in layered and cation-disordered Li-excess cathode materials
journal, May 2016

Seo, Dong-Hwa; Lee, Jinhyuk; Urban, Alexander
Nature Chemistry, Vol. 8, Issue 7
DOI: 10.1038/nchem.2524

Anionic and cationic redox and interfaces in batteries: Advances from soft X-ray absorption spectroscopy to resonant inelastic scattering
journal, June 2018

Yang, Wanli; Devereaux, Thomas P.
Journal of Power Sources, Vol. 389
DOI: 10.1016/j.jpowsour.2018.04.018

Prospects and Limits of Energy Storage in Batteries
journal, February 2015

Abraham, K. M.
The Journal of Physical Chemistry Letters, Vol. 6, Issue 5
DOI: 10.1021/jz5026273

Manganese‐Based Na‐Rich Materials Boost Anionic Redox in High‐Performance Layered Cathodes for Sodium‐Ion Batteries
journal, May 2019

Zhang, Xiaoyu; Qiao, Yu; Guo, Shaohua
Advanced Materials, Vol. 31, Issue 27
DOI: 10.1002/adma.201807770

Prussian blue: a new framework of electrode materials for sodium batteries
journal, January 2012

Lu, Yuhao; Wang, Long; Cheng, Jinguang
Chemical Communications, Vol. 48, Issue 52, p. 6544-6546
DOI: 10.1039/c2cc31777j

Visualization of O-O peroxo-like dimers in high-capacity layered oxides for Li-ion batteries
journal, December 2015

McCalla, E.; Abakumov, A. M.; Saubanere, M.
Science, Vol. 350, Issue 6267
DOI: 10.1126/science.aac8260

Aligning academia and industry for unified battery performance metrics
journal, December 2018

Lin, Zhan; Liu, Tiefeng; Ai, Xinping
Nature Communications, Vol. 9, Issue 1
DOI: 10.1038/s41467-018-07599-8

Charge Transfer Band Gap as an Indicator of Hysteresis in Li-Disordered Rock Salt Cathodes for Li-Ion Batteries
journal, June 2019

Jacquet, Quentin; Iadecola, Antonella; Saubanère, Matthieu
Journal of the American Chemical Society, Vol. 141, Issue 29
DOI: 10.1021/jacs.8b11413

Y-Doped Na ₂ ZrO ₃ : A Na-Rich Layered Oxide as a High-Capacity Cathode Material for Sodium-Ion Batteries
journal, April 2017

Song, Shufeng; Kotobuki, Masashi; Zheng, Feng
ACS Sustainable Chemistry & Engineering, Vol. 5, Issue 6
DOI: 10.1021/acssuschemeng.7b00196

New Insights into the Performance Degradation of Fe-Based Layered Oxides in Sodium-Ion Batteries: Instability of Fe ³⁺ /Fe ⁴⁺ Redox in α-NaFeO ₂
journal, September 2015

Lee, Eungje; Brown, Dennis E.; Alp, Esen E.
Chemistry of Materials, Vol. 27, Issue 19
DOI: 10.1021/acs.chemmater.5b02918

Recent Advances in Sodium-Ion Battery Materials
journal, June 2018

Fang, Yongjin; Xiao, Lifen; Chen, Zhongxue
Electrochemical Energy Reviews, Vol. 1, Issue 3
DOI: 10.1007/s41918-018-0008-x

Approaching the limits of cationic and anionic electrochemical activity with the Li-rich layered rocksalt Li3IrO4
journal, December 2017

Perez, Arnaud J.; Jacquet, Quentin; Batuk, Dmitry
Nature Energy, Vol. 2, Issue 12
DOI: 10.1038/s41560-017-0042-7

Reversible Oxygen Participation to the Redox Processes Revealed for Li _1.20 Mn _0.54 Co _0.13 Ni _0.13 O ₂
journal, January 2013

Koga, Hideyuki; Croguennec, Laurence; Ménétrier, Michel
Journal of The Electrochemical Society, Vol. 160, Issue 6
DOI: 10.1149/2.038306jes

Phase transition induced cracking plaguing layered cathode for sodium-ion battery
journal, December 2018

Wang, Kuan; Yan, Pengfei; Sui, Manling
Nano Energy, Vol. 54
DOI: 10.1016/j.nanoen.2018.09.073

Single-Crystalline Bilayered V ₂ O ₅ Nanobelts for High-Capacity Sodium-Ion Batteries
journal, November 2013

Su, Dawei; Wang, Guoxiu
ACS Nano, Vol. 7, Issue 12
DOI: 10.1021/nn405014d

Electrode Materials for Sodium-Ion Batteries: Considerations on Crystal Structures and Sodium Storage Mechanisms
journal, June 2018

Wang, Tianyi; Su, Dawei; Shanmukaraj, Devaraj
Electrochemical Energy Reviews, Vol. 1, Issue 2
DOI: 10.1007/s41918-018-0009-9

Spectroscopic Signature of Oxidized Oxygen States in Peroxides
journal, October 2018

Zhuo, Zengqing; Pemmaraju, Chaitanya Das; Vinson, John
The Journal of Physical Chemistry Letters, Vol. 9, Issue 21
DOI: 10.1021/acs.jpclett.8b02757

Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release
journal, July 2018

Hu, Enyuan; Yu, Xiqian; Lin, Ruoqian
Nature Energy, Vol. 3, Issue 8
DOI: 10.1038/s41560-018-0207-z

Metal–oxygen decoordination stabilizes anion redox in Li-rich oxides
journal, February 2019

Hong, Jihyun; Gent, William E.; Xiao, Penghao
Nature Materials, Vol. 18, Issue 3
DOI: 10.1038/s41563-018-0276-1

Na-Ion Intercalation and Charge Storage Mechanism in 2D Vanadium Carbide
journal, July 2017

Bak, Seong-Min; Qiao, Ruimin; Yang, Wanli
Advanced Energy Materials, Vol. 7, Issue 20
DOI: 10.1002/aenm.201700959

The Li ₃ Ru _y Nb _{1– y} O ₄ (0 ≤ y ≤ 1) System: Structural Diversity and Li Insertion and Extraction Capabilities
journal, May 2017

Jacquet, Quentin; Perez, Arnaud; Batuk, Dmitry
Chemistry of Materials, Vol. 29, Issue 12
DOI: 10.1021/acs.chemmater.7b01511

Understanding voltage decay in lithium-excess layered cathode materials through oxygen-centred structural arrangement
journal, August 2018

Myeong, Seungjun; Cho, Woongrae; Jin, Wooyoung
Nature Communications, Vol. 9, Issue 1
DOI: 10.1038/s41467-018-05802-4

Electronic structure of RuSr2EuCu2O8studied by x-ray absorption and photoemission spectroscopies
journal, January 2012

Han, S. W.; Ling, D. C.; Tsai, H. M.
Physical Review B, Vol. 85, Issue 1
DOI: 10.1103/physrevb.85.014506

Building better batteries
journal, February 2008

Armand, M.; Tarascon, J.-M.
Nature, Vol. 451, Issue 7179, p. 652-657
DOI: 10.1038/451652a

High Reversibility of Lattice Oxygen Redox Quantified by Direct Bulk Probes of Both Anionic and Cationic Redox Reactions
journal, February 2019

Dai, Kehua; Wu, Jinpeng; Zhuo, Zengqing
Joule, Vol. 3, Issue 2
DOI: 10.1016/j.joule.2018.11.014

Exploring Oxygen Activity in the High Energy P2-Type Na _0.78 Ni _0.23 Mn _0.69 O ₂ Cathode Material for Na-Ion Batteries
journal, March 2017

Ma, Chuze; Alvarado, Judith; Xu, Jing
Journal of the American Chemical Society, Vol. 139, Issue 13
DOI: 10.1021/jacs.7b00164

Recent advances in the research of polyanion-type cathode materials for Li-ion batteries
journal, January 2011

Gong, Zhengliang; Yang, Yong
Energy & Environmental Science, Vol. 4, Issue 9
DOI: 10.1039/c0ee00713g

Elucidating anionic oxygen activity in lithium-rich layered oxides
journal, March 2018

Xu, Jing; Sun, Meiling; Qiao, Ruimin
Nature Communications, Vol. 9, Issue 1
DOI: 10.1038/s41467-018-03403-9

Intermediate honeycomb ordering to trigger oxygen redox chemistry in layered battery electrode
journal, April 2016

Mortemard de Boisse, Benoit; Liu, Guandong; Ma, Jiangtao
Nature Communications, Vol. 7, Issue 1
DOI: 10.1038/ncomms11397

Coupling between oxygen redox and cation migration explains unusual electrochemistry in lithium-rich layered oxides
journal, December 2017

Gent, William E.; Lim, Kipil; Liang, Yufeng
Nature Communications, Vol. 8, Issue 1
DOI: 10.1038/s41467-017-02041-x

Charge compensation mechanisms in Li1.16Ni0.15Co0.19Mn0.50O2 positive electrode material for Li-ion batteries analyzed by a combination of hard and soft X-ray absorption near edge structure
journal, January 2013

Oishi, Masatsugu; Fujimoto, Takahiro; Takanashi, Yu
Journal of Power Sources, Vol. 222
DOI: 10.1016/j.jpowsour.2012.08.023

Chemical and structural instabilities of lithium ion battery cathodes
journal, September 2006

Manthiram, A.; Choi, J.
Journal of Power Sources, Vol. 159, Issue 1
DOI: 10.1016/j.jpowsour.2006.04.028

Emerging Applications of Atomic Layer Deposition for Lithium-Ion Battery Studies
journal, June 2012

Meng, Xiangbo; Yang, Xiao-Qing; Sun, Xueliang
Advanced Materials, Vol. 24, Issue 27
DOI: 10.1002/adma.201200397

Synthesis and Electrochemical Activity of Some Na(Li)‐Rich Ruthenium Oxides with the Feasibility to Stabilize Ru ⁶⁺
journal, February 2019

Otoyama, Misae; Jacquet, Quentin; Iadecola, Antonella
Advanced Energy Materials, Vol. 9, Issue 15
DOI: 10.1002/aenm.201803674

Evidence for an anomalous redox ionic pair between Ru and Mn in SrRu0.5Mn0.5O3: An X-ray absorption spectroscopy approach
journal, November 2002

Manoharan, S. Sundar; Sahu, Ranjan K.
Chemical Communications, Issue 24
DOI: 10.1039/b209293j

Quantitative probe of the transition metal redox in battery electrodes through soft x-ray absorption spectroscopy
journal, September 2016

Li, Qinghao; Qiao, Ruimin; Wray, L. Andrew
Journal of Physics D: Applied Physics, Vol. 49, Issue 41
DOI: 10.1088/0022-3727/49/41/413003

Strong Oxygen Participation in the Redox Governing the Structural and Electrochemical Properties of Na-Rich Layered Oxide Na ₂ IrO ₃
journal, October 2016

Perez, Arnaud J.; Batuk, Dmitry; Saubanère, Matthieu
Chemistry of Materials, Vol. 28, Issue 22
DOI: 10.1021/acs.chemmater.6b03338

Conversion reaction of vanadium sulfide electrode in the lithium-ion cell: Reversible or not reversible?
journal, September 2018

Zhang, Liang; Wei, Qiulong; Sun, Dan
Nano Energy, Vol. 51
DOI: 10.1016/j.nanoen.2018.06.076

Resonant inelastic X-ray scattering spectra at the Ir L -edge in Na 2 IrO 3
journal, October 2016

Igarashi, Jun-ichi; Nagao, Tatsuya
Journal of Electron Spectroscopy and Related Phenomena, Vol. 212
DOI: 10.1016/j.elspec.2016.08.003

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Y-Doped Na ₂ ZrO ₃ : A Na-Rich Layered Oxide as a High-Capacity Cathode Material for Sodium-Ion Batteries
journal, April 2017

New Insights into the Performance Degradation of Fe-Based Layered Oxides in Sodium-Ion Batteries: Instability of Fe ³⁺ /Fe ⁴⁺ Redox in α-NaFeO ₂
journal, September 2015

Recent Advances in Sodium-Ion Battery Materials
journal, June 2018

Approaching the limits of cationic and anionic electrochemical activity with the Li-rich layered rocksalt Li3IrO4
journal, December 2017

Reversible Oxygen Participation to the Redox Processes Revealed for Li _1.20 Mn _0.54 Co _0.13 Ni _0.13 O ₂
journal, January 2013

Phase transition induced cracking plaguing layered cathode for sodium-ion battery
journal, December 2018

Single-Crystalline Bilayered V ₂ O ₅ Nanobelts for High-Capacity Sodium-Ion Batteries
journal, November 2013

Electrode Materials for Sodium-Ion Batteries: Considerations on Crystal Structures and Sodium Storage Mechanisms
journal, June 2018

Spectroscopic Signature of Oxidized Oxygen States in Peroxides
journal, October 2018

Evolution of redox couples in Li- and Mn-rich cathode materials and mitigation of voltage fade by reducing oxygen release
journal, July 2018

Metal–oxygen decoordination stabilizes anion redox in Li-rich oxides
journal, February 2019

Na-Ion Intercalation and Charge Storage Mechanism in 2D Vanadium Carbide
journal, July 2017

The Li ₃ Ru _y Nb _{1– y} O ₄ (0 ≤ y ≤ 1) System: Structural Diversity and Li Insertion and Extraction Capabilities
journal, May 2017

Understanding voltage decay in lithium-excess layered cathode materials through oxygen-centred structural arrangement
journal, August 2018

Electronic structure of RuSr2EuCu2O8studied by x-ray absorption and photoemission spectroscopies
journal, January 2012

Building better batteries
journal, February 2008

High Reversibility of Lattice Oxygen Redox Quantified by Direct Bulk Probes of Both Anionic and Cationic Redox Reactions
journal, February 2019

Exploring Oxygen Activity in the High Energy P2-Type Na _0.78 Ni _0.23 Mn _0.69 O ₂ Cathode Material for Na-Ion Batteries
journal, March 2017

Recent advances in the research of polyanion-type cathode materials for Li-ion batteries
journal, January 2011

Elucidating anionic oxygen activity in lithium-rich layered oxides
journal, March 2018

Intermediate honeycomb ordering to trigger oxygen redox chemistry in layered battery electrode
journal, April 2016

Coupling between oxygen redox and cation migration explains unusual electrochemistry in lithium-rich layered oxides
journal, December 2017

Charge compensation mechanisms in Li1.16Ni0.15Co0.19Mn0.50O2 positive electrode material for Li-ion batteries analyzed by a combination of hard and soft X-ray absorption near edge structure
journal, January 2013

Chemical and structural instabilities of lithium ion battery cathodes
journal, September 2006

Emerging Applications of Atomic Layer Deposition for Lithium-Ion Battery Studies
journal, June 2012

Synthesis and Electrochemical Activity of Some Na(Li)‐Rich Ruthenium Oxides with the Feasibility to Stabilize Ru ⁶⁺
journal, February 2019

Evidence for an anomalous redox ionic pair between Ru and Mn in SrRu0.5Mn0.5O3: An X-ray absorption spectroscopy approach
journal, November 2002

Quantitative probe of the transition metal redox in battery electrodes through soft x-ray absorption spectroscopy
journal, September 2016

Strong Oxygen Participation in the Redox Governing the Structural and Electrochemical Properties of Na-Rich Layered Oxide Na ₂ IrO ₃
journal, October 2016

Conversion reaction of vanadium sulfide electrode in the lithium-ion cell: Reversible or not reversible?
journal, September 2018

Resonant inelastic X-ray scattering spectra at the Ir L -edge in Na 2 IrO 3
journal, October 2016