skip to main content
DOE PAGES title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Exceptional Lithium Storage in a Co(OH) 2 Anode: Hydride Formation

Abstract

Current lithium ion battery technology is tied in with conventional reaction mechanisms such as insertion, conversion, and alloying reactions even though most future applications like EVs demand much higher energy densities than current ones. Exploring the exceptional reaction mechanism and related electrode materials can be critical for pushing current battery technology to a next level. Here, we introduce an exceptional reaction with a Co(OH) 2 material which exhibits an initial charge capacity of 1112 mAh g –1, about twice its theoretical value based on known conventional conversion reaction, and retains its first cycle capacity after 30 cycles. The combined results of synchrotron X-ray diffraction and X-ray absorption spectroscopy indicate that nanosized Co metal particles and LiOH are generated by conversion reaction at high voltages, and Co xH y, Li 2O, and LiH are subsequently formed by hydride reaction between Co metal, LiOH, and other lithium species at low voltages, resulting in a anomalously high capacity beyond the theoretical capacity of Co(OH) 2. This is further corroborated by AIMD simulations, localized STEM, and XPS. Furthermore, these findings will provide not only further understanding of exceptional lithium storage of recent nanostructured materials but also valuable guidance to develop advanced electrode materials withmore » high energy density for next-generation batteries.« less

Authors:
 [1]; ORCiD logo [2];  [1];  [3];  [1];  [1];  [1];  [1];  [2];  [2];  [2]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]
  1. Sungkyunkwan Univ., Suwon (South Korea)
  2. Samsung Advanced Institute of Technology, Suwon (South Korea)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1434329
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
ACS Nano
Additional Journal Information:
Journal Volume: 12; Journal Issue: 3; Journal ID: ISSN 1936-0851
Publisher:
American Chemical Society (ACS)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; colloidal silica-assisted Co(OH)2; high capacity; hydride formation; lithium ion batteries; reaction mechanism

Citation Formats

Kim, Hyunchul, Choi, Woon Ih, Jang, Yoonjung, Balasubramanian, Mahalingam, Lee, Wontae, Park, Gwi Ok, Park, Su Bin, Yoo, Jaeseung, Hong, Jin Seok, Choi, Youn -Suk, Lee, Hyo Sug, Bae, In Tae, Kim, Ji Man, and Yoon, Won -Sub. Exceptional Lithium Storage in a Co(OH)2 Anode: Hydride Formation. United States: N. p., 2018. Web. doi:10.1021/acsnano.8b00435.
Kim, Hyunchul, Choi, Woon Ih, Jang, Yoonjung, Balasubramanian, Mahalingam, Lee, Wontae, Park, Gwi Ok, Park, Su Bin, Yoo, Jaeseung, Hong, Jin Seok, Choi, Youn -Suk, Lee, Hyo Sug, Bae, In Tae, Kim, Ji Man, & Yoon, Won -Sub. Exceptional Lithium Storage in a Co(OH)2 Anode: Hydride Formation. United States. doi:10.1021/acsnano.8b00435.
Kim, Hyunchul, Choi, Woon Ih, Jang, Yoonjung, Balasubramanian, Mahalingam, Lee, Wontae, Park, Gwi Ok, Park, Su Bin, Yoo, Jaeseung, Hong, Jin Seok, Choi, Youn -Suk, Lee, Hyo Sug, Bae, In Tae, Kim, Ji Man, and Yoon, Won -Sub. Mon . "Exceptional Lithium Storage in a Co(OH)2 Anode: Hydride Formation". United States. doi:10.1021/acsnano.8b00435. https://www.osti.gov/servlets/purl/1434329.
@article{osti_1434329,
title = {Exceptional Lithium Storage in a Co(OH)2 Anode: Hydride Formation},
author = {Kim, Hyunchul and Choi, Woon Ih and Jang, Yoonjung and Balasubramanian, Mahalingam and Lee, Wontae and Park, Gwi Ok and Park, Su Bin and Yoo, Jaeseung and Hong, Jin Seok and Choi, Youn -Suk and Lee, Hyo Sug and Bae, In Tae and Kim, Ji Man and Yoon, Won -Sub},
abstractNote = {Current lithium ion battery technology is tied in with conventional reaction mechanisms such as insertion, conversion, and alloying reactions even though most future applications like EVs demand much higher energy densities than current ones. Exploring the exceptional reaction mechanism and related electrode materials can be critical for pushing current battery technology to a next level. Here, we introduce an exceptional reaction with a Co(OH)2 material which exhibits an initial charge capacity of 1112 mAh g–1, about twice its theoretical value based on known conventional conversion reaction, and retains its first cycle capacity after 30 cycles. The combined results of synchrotron X-ray diffraction and X-ray absorption spectroscopy indicate that nanosized Co metal particles and LiOH are generated by conversion reaction at high voltages, and CoxHy, Li2O, and LiH are subsequently formed by hydride reaction between Co metal, LiOH, and other lithium species at low voltages, resulting in a anomalously high capacity beyond the theoretical capacity of Co(OH)2. This is further corroborated by AIMD simulations, localized STEM, and XPS. Furthermore, these findings will provide not only further understanding of exceptional lithium storage of recent nanostructured materials but also valuable guidance to develop advanced electrode materials with high energy density for next-generation batteries.},
doi = {10.1021/acsnano.8b00435},
journal = {ACS Nano},
number = 3,
volume = 12,
place = {United States},
year = {2018},
month = {2}
}

Journal Article:
Free Publicly Available Full Text
Publisher's Version of Record

Save / Share: