Citation: GAN Yong-Ping, LIN Pei-Pei, HUANG Hui, XIA Yang, LIANG Chu, ZHANG Jun, WANG Yi-Shun, HAN Jian-Feng, ZHOU Cai-Hong, ZHANG Wen-Kui. The Effects of Surfactants on Al₂O₃-Modified Li-rich Layered Metal Oxide Cathode Materials for Advanced Li-ion Batteries[J]. Acta Physico-Chimica Sinica, ;2017, 33(6): 1189-1196. doi: 10.3866/PKU.WHXB201702221 shu

The Effects of Surfactants on Al₂O₃-Modified Li-rich Layered Metal Oxide Cathode Materials for Advanced Li-ion Batteries

College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou 310014, P. R. China

Received Date: 2 December 2016
Revised Date: 22 February 2017

Fund Project: The project was supported by the National Natural Science Foundation of China (21403196, 51572240, 51677170), Natural Science Foundation of Zhejiang Province, China (LY15B030003, LY16E070004, LY17E020010) and Ford University Research Program, China.

In this work, a series of Li-rich layered metal oxides (LLMO) as cathode materials for lithium ion batteries were prepared by the coprecipitation method. Various surfactants were introduced into the preparation of Al₂O₃-modified LLMO. The roles of surfactants were systematically investigated to reveal the mechanism of Al₂O₃ modification. The microstructure, morphology and electrochemical performance of the as-prepared samples were studied by the X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), galvanostatic discharge/charge measurement, cycling stability, rate capability and electrochemical impedance spectroscopies. The experimental results showed that Al₂O₃ nanoparticles were uniformly dispersed on the surface of LLMO by using N,N,N-trimethyl-1-dodecanaminium bromide (DTAB) as the surfactant. Al₂O₃-modified LLMO used DTAB as surfactant delivered the initial discharge capacity of 186 mAh·g^-1 at the current density of 600 mA·g^-1. After 500 cycles, the reversible discharge capacity was 132 mAh·g^-1 with a satisfactory capacity retention of 71%. Moreover, the voltage fade of LLMO was greatly suppressed after Al₂O₃ modification, which exhibited superior electrochemical performances.
- Surfactant,
- Lithium-ion battery,
- Cathode material,
- Aluminum oxide,
- Li-rich layered metal oxide
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The Effects of Surfactants on Al₂O₃-Modified Li-rich Layered Metal Oxide Cathode Materials for Advanced Li-ion Batteries