A solvothermal route to prepare enhanced LiNi 0.88 Co 0.09 Al 0.03 O 2 cathode material taking isopropyl alcohol as solv
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SHORT COMMUNICATION
A solvothermal route to prepare enhanced LiNi0.88Co0.09Al0.03O2 cathode material taking isopropyl alcohol as solvent Guolin Cao 1,2 & Jiachao Yang 1,2 & Jie Zhu 1,2 & Yunjiao Li 1,2 & Xiaoming Xi 3 & Junchao Zheng 1,2 & Yike Xiong 1,2 Received: 28 April 2020 / Revised: 5 June 2020 / Accepted: 14 July 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Ni-rich cathode material is taking more and more important position in energy storage and conversion because of their high capacity. But the gap between the demanded and actual capacity still hinder the development of electric vehicle industry. Herein, the Ni-rich (Ni content > 85%) cathode material has received extensive concern. In our research, LiNi0.88Co0.09Al0.03O2 was prepared with solvothermal method by two steps. Meanwhile, the different solvents in solvothermal route are investigated. It is found that LiNi0.88Co0.09Al0.03O2 prepared by isopropyl alcohol shows an excellent capacity retention which is up to 82.3% after 100 cycles at 55 °C, much higher than that prepared by ethyl alcohol (64.0%). The enhanced performance could be ascribed to the specific morphology formed in solvothermal period by the proper solvent. Keywords Solvothermal method . Ni-rich cathode material . Li-ion batteries . Isopropyl alcohol
Introduction Nowadays, the environment deterioration and energy crisis promote the development of lithium cathode batteries [1]. Meanwhile, among the various kinds of lithium cathode materials, the Ni-rich cathode materials which possess the qualities of high specific capacity, long cycling life, low cost, and excellent stability have a vast application in 3 C and vehicle fields [2–4]. In a series of Ni-rich cathode materials, LiNi0.88Co0.09Al0.03O2(NCA) have more widespread application potential in vehicle batteries, whereas the preparing method of that hinders their large-scale application [5–7]. Some researches about the synthesis method are reported, such as
sol-gel [8], spray drying [9], co-precipitation [10], spray pyrolysis [11], and solution combustion [12]. But all the mentioned methods have some limitations. For instance, it is hard to realize the co-precipitation of Ni2+, Co2+, Al3+ with the great difference of solubility product constant ( K θsp NiðOHÞ2 ¼ 5:0 10−16 , K θsp CoðOHÞ2 ¼ 2:3 10−16 and K θsp NiðOHÞ2 ¼ 1:3 10−33 ). In recent years, many kinds of materials in the fields of the energy storage and catalysis are prepared via the solvothermal method [13, 14]. To prepare NCA cathode material, the solvothermal route could be considered as a better method than others by contrast. Via the solvothermal route, the prepared
Guolin Cao and Jiachao Yang contributed equally to this work. * Yunjiao Li [email protected]
Junchao Zheng [email protected] Yike Xiong [email protected]
Guolin Cao [email protected] Jiachao Yang [email protected]
1
School of Metallurgy and Environment, Central South University, Changsha 410083, People’s Republic of China
2
Engineering Research Cent
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