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http://dx.doi.org/10.3740/MRSK.2022.32.4.210

Synthesis of Ni-rich NCMA Precursor through Co-precipitation and Improvement of Cycling through Boron and Sn Doping  

Jeon, Hyungkwon (Chungnam National University)
Hong, Soonhyun (Chungnam National University)
Kim, Minjeong (Chungnam National University)
Koo, Jahun (Chungnam National University)
Lee, Heesang (Chungnam National University)
Choi, Gyuseok (Gumi Electronic and Information Technology Research Institute)
Kim, Chunjoong (Chungnam National University)
Publication Information
Korean Journal of Materials Research / v.32, no.4, 2022 , pp. 210-215 More about this Journal
Abstract
Extensive research is being carried out on Ni-rich Li(NixCoyMn1-x-y)O2 (NCM) due to the growing demand for electric vehicles and reduced cost. In particular, Ni-rich Li(NixCoyMn1-x-y-zAlz)O2 (NCMA) is attracting great attention as a promising candidate for the rapid development of Co-free but electrochemically more stable cathodes. Al, an inactive element in the structure, helps to improve structural stability and is also used as a doping element to improve cycle capability in Ni-rich NCM. In this study, NCMA was successfully synthesized with the desired composition by direct coprecipitation. Boron and tin were also used as dopants to improve the battery performance. Macro- and microstructures in the cathodes were examined by microscopy and X-ray diffraction. While Sn was not successfully doped into NCMA, boron could be doped into NCMA, leading to changes in its physicochemical properties. NCMA doped with boron revealed substantially improved electrochemical properties in terms of capacity retention and rate capability compared to the undoped NCMA.
Keywords
cathode; Ni-rich $Li(Ni_xCo_yMn_{1-x-y-z}Al_z)O_2$; boron; tin; doping;
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