141 0

Structural Stability of LiNiO2 Cycled above 4.2 V

Title
Structural Stability of LiNiO2 Cycled above 4.2 V
Author
선양국
Keywords
LITHIUM-ION BATTERIES; LAYERED CATHODE MATERIALS; SECONDARY BATTERIES; HIGH-ENERGY; CELLS; ELECTROCHEMISTRY; OPTIMIZATION; PERFORMANCE; PHASE
Issue Date
2017-04
Publisher
AMER CHEMICAL SOC
Citation
ACS ENERGY LETTERS, v. 2, no. 5, page. 1150-1155
Abstract
A spherical stoichiometric LiNiO2, particle, which was composed of compactly packed nanosized primary particles, was prepared and cycled at different cutoff voltages to explicitly demonstrate the effect of phase transitions during Li deintercalation/intercalation on the Li-ion intercalation stability of LiNiO2. The capacity retention was greatly improved by suppressing the H2 -> H3 phase transition at 4.1 V, such that 95% of the initial capacity (164 mAh g(-1)) was retained after 100 cycles when cycled at 4.1 V. At 4.2 and 4.3 V, continuous capacity loss (81% of 191 mAh g(-1) at 4.2 V and 75% of 232 mAh g(-1) at 4.3 V after 100 cycles) was observed during cycling, and these electrodes incurred extensive structural damages (micro-, hairline and nanoscale cracks observed by transmission electron microscopy) from the repeated lattice contraction and expansion accompanying the H2 -> H3 transition, in agreement with the cycling data.
URI
https://pubs.acs.org/doi/10.1021/acsenergylett.7b00304https://repository.hanyang.ac.kr/handle/20.500.11754/113620
ISSN
2380-8195
DOI
10.1021/acsenergylett.7b00304
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE