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Beyond Doping and Coating: Prospective Strategies for Stable High-Capacity Layered Ni-Rich Cathodes

Title
Beyond Doping and Coating: Prospective Strategies for Stable High-Capacity Layered Ni-Rich Cathodes
Author
선양국
Keywords
LITHIUM-ION BATTERIES; X-RAY-DIFFRACTION; HIGH CUTOFF VOLTAGE; HIGH-ENERGY; CONCENTRATION-GRADIENT; CYCLING PERFORMANCE; LINIO2 CATHODE; CORE-SHELL; ELECTROCHEMICAL PROPERTIES; LIALYNI1-X-YCOXO2 CATHODE
Issue Date
2020-04
Publisher
AMER CHEMICAL SOC
Citation
ACS ENERGY LETTERS, v. 5, no. 4, page. 1136-1146
Abstract
This Perspective discusses the prospective strategies for overcoming the stability and capacity trade-off associated with increased Ni content in layered Ni-rich Li[NixCoyMnz]O-2 (NCM) and Li[NixCoyAlz]O-2 (NCA) cathodes. The Ni-rich NCM and NCA cathodes have largely replaced the LiCoO2 cathodes in commercial batteries because of their lower cost, higher energy density, good rate capability, and reliability that has been extensively field-tested. Nevertheless, they suffer from microcrack generation along grain boundaries and Ni3+/4+ reactivity that rapidly deteriorate electrochemical performance. Doping and coating have been efficient strategies in delaying the onset of the damage, but they fail to overcome the degradation. There are, however, alternative strategies that directly counter the inherent degradation through micro- and nanostructural modifications of the Ni-rich NCM and NCA cathodes.
URI
https://pubs.acs.org/doi/10.1021/acsenergylett.0c00191https://repository.hanyang.ac.kr/handle/20.500.11754/165828
ISSN
2380-8195
DOI
10.1021/acsenergylett.0c00191
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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