K-Ion Batteries Based on a P2-Type K0.6CoO2 Cathode

Kim, Haegyeom; Kim, Jae Chul; Bo, Shou-Hang; Shi, Tan; Kwon, Deok-Hwang; Ceder, Gerbrand

doi:10.1002/aenm.201700098

Title: K-Ion Batteries Based on a P2-Type K_0.6CoO₂ Cathode

Abstract

K‐ion batteries are a potentially exciting and new energy storage technology that can combine high specific energy, cycle life, and good power capability, all while using abundant potassium resources. The discovery of novel cathodes is a critical step toward realizing K‐ion batteries (KIBs). In this work, a layered P2‐type K _0.6 CoO ₂ cathode is developed and highly reversible K ion intercalation is demonstrated. In situ X‐ray diffraction combined with electrochemical titration reveals that P2‐type K _0.6 CoO ₂ can store and release a considerable amount of K ions via a topotactic reaction. Despite the large amount of phase transitions as function of K content, the cathode operates highly reversibly and with good rate capability. The practical feasibility of KIBs is further demonstrated by constructing full cells with a graphite anode. This work highlights the potential of KIBs as viable alternatives for Li‐ion and Na‐ion batteries and provides new insights and directions for the development of next‐generation energy storage systems.

Authors:

Kim, Haegyeom ^[1]; Kim, Jae Chul ^[1]; Bo, Shou-Hang ^[1]; Shi, Tan ^[2]; Kwon, Deok-Hwang ^[2]; Ceder, Gerbrand ^[2]

Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley CA 94720 USA
Department of Materials Science and Engineering, University of California, Berkeley CA 94720 USA

Publication Date:: Sat Apr 01 00:00:00 EDT 2017

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

Sponsoring Org.:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

OSTI Identifier:: 1361219

Alternate Identifier(s):: OSTI ID: 1361220; OSTI ID: 1437001

Grant/Contract Number:: AC02-05CH11231; DE‐AC02‐05CH11231

Resource Type:: Published Article

Journal Name:: Advanced Energy Materials

Additional Journal Information:: Journal Name: Advanced Energy Materials; Journal ID: ISSN 1614-6832

Publisher:: Wiley

Country of Publication:: Germany

Language:: English

Subject:: 25 ENERGY STORAGE

Citation Formats


                    Kim, Haegyeom, Kim, Jae Chul, Bo, Shou-Hang, Shi, Tan, Kwon, Deok-Hwang, and Ceder, Gerbrand. K-Ion Batteries Based on a P2-Type K0.6CoO2 Cathode.  Germany: N. p., 2017. 
Web.  doi:10.1002/aenm.201700098.

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                    Kim, Haegyeom, Kim, Jae Chul, Bo, Shou-Hang, Shi, Tan, Kwon, Deok-Hwang, & Ceder, Gerbrand. K-Ion Batteries Based on a P2-Type K0.6CoO2 Cathode.  Germany.  https://doi.org/10.1002/aenm.201700098

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                    Kim, Haegyeom, Kim, Jae Chul, Bo, Shou-Hang, Shi, Tan, Kwon, Deok-Hwang, and Ceder, Gerbrand. Sat .  
"K-Ion Batteries Based on a P2-Type K0.6CoO2 Cathode".  Germany.  https://doi.org/10.1002/aenm.201700098.

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@article{osti_1361219,

  title        = {K-Ion Batteries Based on a P2-Type K0.6CoO2 Cathode},

  author       = {Kim, Haegyeom and Kim, Jae Chul and Bo, Shou-Hang and Shi, Tan and Kwon, Deok-Hwang and Ceder, Gerbrand},

  abstractNote = {K‐ion batteries are a potentially exciting and new energy storage technology that can combine high specific energy, cycle life, and good power capability, all while using abundant potassium resources. The discovery of novel cathodes is a critical step toward realizing K‐ion batteries (KIBs). In this work, a layered P2‐type K 0.6 CoO 2 cathode is developed and highly reversible K ion intercalation is demonstrated. In situ X‐ray diffraction combined with electrochemical titration reveals that P2‐type K 0.6 CoO 2 can store and release a considerable amount of K ions via a topotactic reaction. Despite the large amount of phase transitions as function of K content, the cathode operates highly reversibly and with good rate capability. The practical feasibility of KIBs is further demonstrated by constructing full cells with a graphite anode. This work highlights the potential of KIBs as viable alternatives for Li‐ion and Na‐ion batteries and provides new insights and directions for the development of next‐generation energy storage systems.},

  doi          = {10.1002/aenm.201700098},

  journal      = {Advanced Energy Materials},

  number       = ,

  volume       = ,

  place        = {Germany},

  year         = {Sat Apr 01 00:00:00 EDT 2017},

  month        = {Sat Apr 01 00:00:00 EDT 2017}

}

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Title: K-Ion Batteries Based on a P2-Type K0.6CoO2 Cathode

Abstract

Citation Formats

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Tuning charge–discharge induced unit cell breathing in layer-structured cathode materials for lithium-ion batteries
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Thermodynamic functions of transfer of single ions from water to nonaqueous and mixed solvents: Part 3 - Standard potentials of selected electrodes
journal, January 1985

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