The layered LiNi0.5Mn0.3Co0.2O2 (NMC532) material displays capacity loss and poor rate performance even though it is a widely used cathode in commercial Li-ion batteries (LIBs). In this work, the structural and electrochemical performance of the NMC532 cathode were optimized using the fuel-to-oxidizer ratio assisted sol-gel combustion synthesis (SCS). It was shown that the fuel-to-oxidizer ratio markedly influenced the exothermicity of the combustion reaction which affected the crystal structure, morphology, and electrochemical performance of the final NCM532 materials. The fuel lean (FL) composition produced NMC532 cathode materials with the biggest crystallite and particle sizes, less cation mixing degree and better layered structure compared with the fuel stoichiometric (FS) and fuel rich (FR) compositions. The FL cell presented an initial discharge capacity of 180 mAh g(-1) and the highest capacity retention of 92.2 % when it was cycled at 0.1 C between 2.5 and 4.4 V. Also, the FL cell displayed exceptional rate capability with the average capacities reaching 180, 178, 175, and 173 mAh/g at current densities of 1 C, 3 C, 5 C, and 10 C, respectively between 3.0 and 4.6 V. The EIS tests and dQ/dV plots showed that the FL cell both had the least impedance and polarization. The superior electrochemical performance of the FL material was ascribed to its optimized structural properties. Furthermore, the electrochemical results also show the influence of voltage window and current density on the performance of the NMC532 cathode materials.
机构:
Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Lei, Tongxing
Li, Yunjiao
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Li, Yunjiao
Su, Qianye
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Su, Qianye
Cao, Guolin
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Qing Hai Kuai Lv Hightech Co Ltd, Shenzhen 810000, Qinghai, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Cao, Guolin
Li, Wei
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Cit Dameng Min Ind Ltd, Nanning 530028, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Li, Wei
Chen, Yongxiang
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Chen, Yongxiang
Xue, Longlong
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Xue, Longlong
Deng, Shiyi
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
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Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R ChinaYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Zhao, Yinghao
Kantichaimongkol, Pongsakorn
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Chulalongkorn Univ, Int Grad Program Nanosci & Technol, Bangkok 10330, Thailand
Chulalongkorn Univ, Fac Sci, Ctr Excellence Adv Mat Energy Storage, Dept Mat Sci, Bangkok 10330, ThailandYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Kantichaimongkol, Pongsakorn
Yang, Chengwu
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Chulalongkorn Univ, Fac Sci, Ctr Excellence Adv Mat Energy Storage, Dept Mat Sci, Bangkok 10330, ThailandYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Yang, Chengwu
Dai, Zhiqiang
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Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R ChinaYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Dai, Zhiqiang
Xu, Dong
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Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R ChinaYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Xu, Dong
Zhang, Xueqing
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Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R ChinaYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Zhang, Xueqing
Okhawilai, Manunya
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Chulalongkorn Univ, Met & Mat Sci Res Inst, Bangkok 10330, ThailandYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Okhawilai, Manunya
Pattananuwat, Prasit
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Chulalongkorn Univ, Fac Sci, Ctr Excellence Adv Mat Energy Storage, Dept Mat Sci, Bangkok 10330, ThailandYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Pattananuwat, Prasit
Zhang, Xinyu
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Yanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R ChinaYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
Zhang, Xinyu
Qin, Jiaqian
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Chulalongkorn Univ, Fac Sci, Ctr Excellence Adv Mat Energy Storage, Dept Mat Sci, Bangkok 10330, Thailand
Chulalongkorn Univ, Ctr Excellence Petrochem & Mat Technol, Bangkok 10330, ThailandYanshan Univ, State Key Lab Metastable Mat Sci & Technol, Qinhuangdao 066004, Peoples R China
机构:
Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Cit Dameng Min Ind Ltd, Nanning 530028, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Li, Yunjiao
Su, Qianye
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Cit Dameng Min Ind Ltd, Nanning 530028, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Su, Qianye
Han, Qiang
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Cit Dameng Min Ind Ltd, Nanning 530028, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Han, Qiang
Li, Puliang
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Cit Dameng Min Ind Ltd, Nanning 530028, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Li, Puliang
Li, Ling
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Cit Dameng Min Ind Ltd, Nanning 530028, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Li, Ling
Xu, Chunrui
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Xu, Chunrui
Cao, Xinlong
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China
Cao, Xinlong
Cao, Guolin
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Cent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R ChinaCent S Univ, Sch Met & Environm, Changsha 410083, Hunan, Peoples R China