期刊
ACS ENERGY LETTERS
卷 2, 期 5, 页码 1150-1155出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsenergylett.7b00304
关键词
-
类别
资金
- Global Frontier R&D Program on the Center for Hybrid Interface Materials (HIM) - Ministry of Science, Information & Communication Technology (ICT) [2013M3A6B1078875]
- National Research Foundation of Korea (NRF) - Korea government (MEST) [2014R1A2A1A13050479]
- National Research Foundation of Korea [2013M3A6B1078875] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据