The effect on the properties of each element in the Li 1.2 Mn 0.54 Ni 0.13 Co 0.13 O 2 material by the incorporation of
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ORIGINAL PAPER
The effect on the properties of each element in the Li1.2Mn0.54Ni0.13Co0.13O2 material by the incorporation of Al Zhaojiao Shi 1 & Xuan Wang 1 & Wangjun Feng 1 & Changkun Song 1 & Linjing Chen 1 & Miaomiao Li 1 Received: 22 October 2019 / Revised: 29 February 2020 / Accepted: 3 March 2020 # Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract In this paper, a lithium-rich layered cathode material Li1.2Mn0.54Ni0.13Co0.13O2 was synthesized by improving the sol-gel method. Lithium-rich manganese-based cathode materials are one of the promising next-generation lithium-ion battery cathode materials. However, this material has problems of severe capacity reduction and poor rate performance. By adding a certain amount of Al to replace the metal element in the raw material, and then testing and analyzing various produced materials, it was found that adding a certain amount of Al to replace the lithium element in the raw material can improve the cycle performance and stability of the material. XRD and SEM results show that the incorporation of Al does not significantly change the structure and morphology of the material. The results of electrochemical tests show that the Al-doped sample LMNCAO-1 has good specific capacity and stability. LMNCAO-1 has a high initial specific capacity of 271.0 mAh/g at a voltage of 2–4.8 V and a current density of 0.1 C. The initial discharge specific capacity of the sample LMNCAO-1 was 185 mAh/g at 0.5 C, and the cycle retention rate was 97.3% after 100 cycles. Keywords Lithium-rich manganese-based . Al doping . Electrochemical performance . Sol-gel method . Cathode
Introduction Lithium-ion batteries (LIBs) are the latest generation of secondary batteries with the highest energy density, environmentally friendly, and long use time [1, 2]. Lithium-ion batteries have been widely used in electric vehicles, hybrid vehicles, and portable electronic devices [3–6]. With the rapid development of society and technology, people’s demand for energy is increasing, so we need to develop a lithium-ion battery cathode material with high energy and performance [7]. Lithium-ion batteries are composed of cathode and anode materials, diaphragm, electrolyte, and so on. The main determinant is the cathode material. At present, the transition metal layer oxides have become the mainstream in the cathode materials of lithium-ion batteries. These include LiCoO 2, LiMnO2, LiNiO2, LiNixCoyMnzO2, and so on [8].
* Xuan Wang [email protected] * Wangjun Feng [email protected] 1
School of Science, Lanzhou University of Technology, Lanzhou 730050, China
In recent years, many researchers have paid more attention to lithium-rich manganese-based cathode materials, which were discovered in the process of developing manganese oxides as lithium-ion cathode materials. Lithium-rich manganese-based solid solution material is a relatively new cathode material for lithium-ion battery. Lithium-rich manganese-based materials can be expressed by the general formula xLi [Li1/3Mn2/3]O2·(1x)LiMO2 (0 ≤ × ≤ 1)
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