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Title: High-Energy/Power and Low-Temperature Cathode for Sodium-Ion Batteries: In Situ XRD Study and Superior Full-Cell Performance

Authors:
 [1];  [2]; ORCiD logo [1];  [1];  [3];  [4];  [1]; ORCiD logo [2]
  1. National and Local United Engineering Laboratory for Power Batteries, Faculty of Chemistry, Northeast Normal University, Changchun Jilin 130024 P. R. China
  2. CAS Key Laboratory of Molecular Nanostructure and Nanotechnology, CAS Research/Education Center for Excellence in Molecular Sciences, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing 100190 P. R. China; School of Chemistry and Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049 P. R. China
  3. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue Singapore 639798 Singapore
  4. Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park CA 94025 USA; Department of Chemistry, University of California, Berkeley CA 94720 USA
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1394083
DOE Contract Number:
AC02-76SF00515; 51602048; 51225204; 2016YFA0202500; 20150520027JH; 111099108; RG2/13; RG113/15
Resource Type:
Journal Article
Resource Relation:
Journal Name: Advanced Materials; Journal Volume: 29; Journal Issue: 33
Country of Publication:
United States
Language:
English

Citation Formats

Guo, Jin-Zhi, Wang, Peng-Fei, Wu, Xing-Long, Zhang, Xiao-Hua, Yan, Qingyu, Chen, Hong, Zhang, Jing-Ping, and Guo, Yu-Guo. High-Energy/Power and Low-Temperature Cathode for Sodium-Ion Batteries: In Situ XRD Study and Superior Full-Cell Performance. United States: N. p., 2017. Web. doi:10.1002/adma.201701968.
Guo, Jin-Zhi, Wang, Peng-Fei, Wu, Xing-Long, Zhang, Xiao-Hua, Yan, Qingyu, Chen, Hong, Zhang, Jing-Ping, & Guo, Yu-Guo. High-Energy/Power and Low-Temperature Cathode for Sodium-Ion Batteries: In Situ XRD Study and Superior Full-Cell Performance. United States. doi:10.1002/adma.201701968.
Guo, Jin-Zhi, Wang, Peng-Fei, Wu, Xing-Long, Zhang, Xiao-Hua, Yan, Qingyu, Chen, Hong, Zhang, Jing-Ping, and Guo, Yu-Guo. Thu . "High-Energy/Power and Low-Temperature Cathode for Sodium-Ion Batteries: In Situ XRD Study and Superior Full-Cell Performance". United States. doi:10.1002/adma.201701968.
@article{osti_1394083,
title = {High-Energy/Power and Low-Temperature Cathode for Sodium-Ion Batteries: In Situ XRD Study and Superior Full-Cell Performance},
author = {Guo, Jin-Zhi and Wang, Peng-Fei and Wu, Xing-Long and Zhang, Xiao-Hua and Yan, Qingyu and Chen, Hong and Zhang, Jing-Ping and Guo, Yu-Guo},
abstractNote = {},
doi = {10.1002/adma.201701968},
journal = {Advanced Materials},
number = 33,
volume = 29,
place = {United States},
year = {Thu Jun 22 00:00:00 EDT 2017},
month = {Thu Jun 22 00:00:00 EDT 2017}
}
  • A low-cost sodium-ion full cell with a O3-type layered Na[Cu 0.2(Fe 1/3Mn2/3) 0.8]O 2 cathode and an alloy-type P-TiP2-C anode is presented. The cathode is synthesized by an oxalate coprecipitation method and optimized cathodes shows a high specific capacity of 135 mAh g -1 at 0.1C rate with a high rate capability of 90 mAh g-1 at 1C rate and 70 mAh g -1 at 2C rate with good cyclability. The full cell exhibits better capacity retention than the half cell with the cathode due to the elimination of the degradation caused by sodium-metal anode. The dramatically enhanced electrochemical performancemore » of the Na[Cu 0.2(Fe 1/3Mn 2/3) 0.8]O 2 / P-TiP 2-C full cell compared to that of the sample with no Cu is attributed to the structural stabilization imparted by Cu by suppressing the phase change from the O3 structure to the P3 structure during cycling.« less
  • The severe capacity decay of LiFePO{sub 4} at low temperatures (≤0 °C) limits its wide applications as cathode materials for energy storage batteries. Creating comprehensive carbon network between particles with improved electronic conductivity is a well known solution to this problem. Here, a novel structured LiFePO{sub 4}/C composite was prepared by a facile solid state route, in which nanosized LiFePO{sub 4} spheres were encapsulated by in-situ graphitized carbon cages. With the enhancement in electronic conductivity (2.15e−1 S cm{sup −1}), the composite presented excellent rate performance at room temperature and remarkable capacity retention at −40 °C, with charge transfer resistance muchmore » lower than commercial LiFePO{sub 4}. - Graphical abstract: A novel structured LiFePO{sub 4/}C composite was prepared by a facile solid state route, in which nanosized LiFePO{sub 4} spheres were encapsulated by in-situ graphitized carbon cages. - Highlights: • Several nano-sized LiFePO{sub 4} particles are encapsulated in carbon cage. • Carbon is in-situ graphitized with enhanced electronic conductivity. • The as prepared LiFePO{sub 4} exhibits notable capacity retention at −40 °C. • R{sub ct} is lowered by a factor of ∼10 compared with commercial LiFePO{sub 4}.« less
  • Vanadyl phosphates (VOPO 4) represent a class of attractive cathodes in lithium-ion batteries. However, the exploration of this type of materials in sodium-ion batteries is rare. Here, we report for the first time the synthesis of orthorhombic β-NaVOPO 4 by first chemically extracting lithium from beta-LiVOPO 4 and then inserting sodium into the obtained β-VOPO 4 by a microwave-assisted solvothermal process with NaI, which serves both as a reducing agent and sodium source. Intermediate Na xVOPO 4 compositions with x = 0.3, 0.5, and 0.8 have also been obtained by controlling the amount of NaI in the reaction mixture. Jointmore » Rietveld refinement of synchrotron X-ray diffraction (XRD) and neutron diffraction confirms that the fully sodiated β-NaVOPO 4 is isostructural with the lithium counterpart β-LiVOPO 4. Bond valence sum maps suggest that sodium ions possibly diffuse along the [010] direction in the lattice, similar to the ionic conduction pathway in β-LiVOPO 4. Although the initial discharge capacity is low due to the protons in the structure, it steadily increases with cycling with a long plateau at 3.3 V. As a result, ex situ XRD data of cycled β-VOPO 4 and β-NaVOPO 4 electrodes confirm the reversible reaction in sodium cells involving the V 4+/V 5+ redox couple.« less