A comparative studies on Li(Ni0.8Co0.15Al0.05)O2 and ZrO2-coated Li(Ni0.8Co0.15Al0.05)O2 cathode materials during cycling using Synchrotron based In Situ X-Ray Diffraction Technique
- A comparative studies on Li(Ni0.8Co0.15Al0.05)O2 and ZrO2-coated Li(Ni0.8Co0.15Al0.05)O2 cathode materials during cycling using Synchrotron based In Situ X-Ray Diffraction Technique
- 김상훈; 윤원섭; 조병원; 정경윤
- Li(Ni0.8Co0.15Al0.05)O2; ZrO2 coating; in situ XRD
- Issue Date
- 2010년 한국전기화학회 춘계학회
- LiNiO2 has been studied extensively as an alternative cathode materials for
commercially used LiCoO2. LiNiO2 has higher specific capacity than LiCoO2
and an advantage of lower cost over LiCoO2. However, it suffers from poor
cycling reversibility and thermal instability, which led to a problem of
practical uses. Many researchers have made various efforts to improve the
cycle performance and stability of the nickel based cathode materials. Among
those, doping and surface modification are useful ways to improve the
electrochemical performances. Among different variants of LiNiO2, Co and Al
doped Li(Ni0.8Co0.15Al0.05)O2 shown to have performances over other variants.
Moreover, appropriate surface modification will further improve it thermal
stability and cycling performances.
In this study, synchrotron based in situ XRD technique was used to study
the structure change of ZrO2-coated Li(Ni0.8Co0.15Al0.05)O2 and uncoated
Li(Ni0.8Co0.15Al0.05)O2. The structural information collected during
charging/discharging provides valuable information related to its
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