Studies of LiNi2/3Mn1/3O2: A Positive Electrode Material That Cycles Well to 4.6 V

被引：16

作者：

Zhou, Fu ^{[1
]}

Zhao, Xuemei ^{[1
]}

Smith, A. J. ^{[1
]}

Dahn, J. R. ^{[1
]}

机构：

[1] Dalhousie Univ, Dept Phys & Atmospher Sci, Halifax, NS B3H 3J5, Canada

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 2010年 / 157卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

ammonia; calorimetry; electrochemical electrodes; lithium compounds; nickel compounds; precipitation; scanning electron microscopy; X-ray diffraction; SITU X-RAY; POWDER DIFFRACTION; CATHODE MATERIALS; ION BATTERIES; SPINEL OXIDES; LITHIUM; VOLTAGE; COPRECIPITATION; PERFORMANCE; HYDROXIDES;

D O I：

10.1149/1.3294792

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

LiNi2/3Mn1/3O2 was synthesized from LiOH center dot H2O and Ni2/3Mn1/3(OH)(2) mixed hydroxide. Four different coprecipitation routes were used to prepare the Ni2/3Mn1/3(OH)(2) precursor beginning with divalent metal nitrates or metal sulfates. When ammonia was added during the coprecipitation under anaerobic conditions, spherical and dense particles of Ni2/3Mn1/3(OH)(2) were prepared. The impact of various coprecipitation methods on the subsequent properties of LiNi2/3Mn1/3O2 was studied by X-ray diffraction (XRD), scanning electron microscopy (SEM), and electrochemical tests. Spherical and dense particles of LiNi2/3Mn1/3O2 showed an excellent charge-discharge cycle life at 4.6 V. The impact of heating temperature and time on the properties of LiNi2/3Mn1/3O2 was also studied by XRD, SEM, and electrochemical tests and suggested that the heating temperature plays a significant role in determining the electrochemical performance of LiNi2/3Mn1/3O2. Accelerating rate calorimetry results suggest that LiNi2/3Mn1/3O2 is less thermally stable than Li[Ni1/3Mn1/3Co1/3]O-2.

引用

页码：A399 / A406

页数：8

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