Simply Constructing Li1.2Mn0.6Ni0.2O2/C Composites for Superior Electrochemical Performance and Thermal Stability in Li-Ion Battery

被引：2
作者：
Chen, Dandan [1 ]
Xie, Dongjiu [2 ]
Li, Guangshe [1 ]
Zhang, Dan [1 ]
Fan, Jianming [3 ]
Li, Baoyun [1 ]
Feng, Tao [1 ]
Li, Liping [1 ]
机构：
[1] Jilin Univ, Coll Chem, State Key Lab Inorgan Synth & Preparat Chem, Changchun 130012, Jilin, Peoples R China
[2] Helmholtz Ctr Berlin Mat & Energy, Inst Soft Matter & Funct Mat, Hahn Meitner Pl 1, D-14109 Berlin, Germany
[3] Longyan Univ, Coll Chem & Mat, Longyan 364012, Peoples R China
来源：
CHEMISTRYSELECT | 2018年 / 3卷 / 48期
基金：
中国国家自然科学基金;
关键词：
Layered Li-rich materials; Lithium-ion batteries; Strong interaction; Surface modification; Thermal stability; CATHODE MATERIAL; SURFACE MODIFICATION; LOCAL-STRUCTURE; RICH; VOLTAGE; OXIDES; ENERGY; INTERFACE; ELECTRODE; MECHANISM;
D O I：
10.1002/slct.201803236
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
A Co-free Li-rich cathode material Li1.2Mn0.6Ni0.2O2 has been successfully modified by conductive acetylene black (CAB) using a simple physical grinding and post annealing process. X-ray photoelectron spectroscopy (XPS), X-ray absorption near-edge structure (XANES) and Fourier transform infrared spectra (FTIR) characterizations show that annealing process leads to the formation of a strong chemical interaction between CAB and Li1.2Mn0.6Ni0.2O2. The modified sample with 5wt% CAB exhibits excellent cycle stability (83.9% capacity retention after 100 cycles at 1 C) and remarkable rate capacity (93.0 mAh g(-1) at 10 C). At the same time, the thermal stability of pristine is obviously enhanced by modification with CAB. Such improvement is ascribed to the existence of the strong interaction between Li-rich oxide and CAB. This work will offer hints for promoting the commercialization of Li-rich cathodes.
引用
收藏
页码：13647 / 13653
页数：7
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