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| Effects of Zirconium Substitution on Electrochemical Performance of Li(Ni0.9Co0.05Al0.05)O2 for Lithium-Ion Batteries |
| Author Name | Affiliation | E-mail | | TAN Chao-Pu | School of Metallurgy and Environment, Central South University, Changsha 410083, China | | | HUANG Dian-Hua | Guangzhou Libode New Materials Co., Ltd., Guangzhou 510800, China | | | LUO Hong-Jun | Guangzhou Libode New Materials Co., Ltd., Guangzhou 510800, China | | | DU Ke | School of Metallurgy and Environment, Central South University, Changsha 410083, China | csutcp@163.com | | CAO Yan-Bing | School of Metallurgy and Environment, Central South University, Changsha 410083, China | | | HU Guo-Rong | School of Metallurgy and Environment, Central South University, Changsha 410083, China | |
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| Abstract: Spherical precursor Ni0.9Co0.05Al0.03Zr0.02(OH)2 was obtained by controlled crystallization method. A uniform mixture of Ni0.9Co0.05Al0.03Zr0.02(OH)2 and LiOH·H2O was sintered under 750℃ in O2 atmosphere to synthesize layered Li(Ni0.9Co0.05Al0.03Zr0.02)O2 cathode material. SEM images show that the precursor and cathode material have well morphology. XRD patterns show that the product possesse a well-layered α-NaFeO2 structure. EDXS images show the Zr element in the material is distributed evenly. The cells with the material as cathode display excellent electrochemical performance:an initial discharge capacity of 221.5 mAh·g-1 at 0.2C between 2.8 and 4.3 V with an initial coulombic efficiency of 90.3%, a discharge capacity of 192.7 mAh·g-1 at 2C and a capacity retention rate of 92.2% after 100 cycles at 25℃. As the temperature raised to 55℃, the discharge capacity was 236.2 mAh·g-1 at 0.2C in 2.8~4.3 V, and retained a capacity retention rate of 85.1% after 100 cycles at 2C. |
| Keywords: lithium-ion battery cathode material co-precipitation zirconium substitution |
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| TAN Chao-Pu,HUANG Dian-Hua,LUO Hong-Jun,DU Ke,CAO Yan-Bing,HU Guo-Rong.Effects of Zirconium Substitution on Electrochemical Performance of Li(Ni0.9Co0.05Al0.05)O2 for Lithium-Ion Batteries[J].Chinese Journal of Inorganic Chemistry,2018,34(4):647-654. |
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