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Title: K-Ion Batteries Based on a P2-Type K 0.6CoO 2 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 0.6CoO 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 0.6CoO 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:
 [1];  [1];  [1];  [2];  [2];  [2]
  1. Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley CA 94720 USA
  2. Department of Materials Science and Engineering, University of California, Berkeley CA 94720 USA
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (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
Resource Type:
Journal Article: 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.
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. doi:10.1002/aenm.201700098.
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. doi:10.1002/aenm.201700098.
@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 K0.6CoO2 cathode is developed and highly reversible K ion intercalation is demonstrated. In situ X-ray diffraction combined with electrochemical titration reveals that P2-type K0.6CoO2 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},
issn = {1614-6832},
number = ,
volume = ,
place = {Germany},
year = {2017},
month = {4}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record at 10.1002/aenm.201700098

Citation Metrics:
Cited by: 45 works
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