首页|Plane-controlled growth strategy improves electrochemical performance of cobalt-free LiNi0.9Mn0.1O2 cathode

Plane-controlled growth strategy improves electrochemical performance of cobalt-free LiNi0.9Mn0.1O2 cathode

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The ultra-high nickel-layered cathodes(Ni ≥ 90％)has garnered significant attention due to its high specific capacity.However,the widespread application of ultra-high nickel-layered cathodes still suffers limitation by structural instability and poor rate performance.Herein,a crystal-face-induced strategy is proposed to enhance rate and cycling performances of the electrode by constructing rapid Li+diffusion channel and reducing internal grain boundaries of secondary particles.The crystal-face-induced strategy facilitates the growth of {010} lattice plane.Highly exposed {010} planes provide wide-open and unobstructed channels for Li+deintercalation/intercalation,enhances the electrode diffusion kinetics,and thus improves the electrode rate performance.In addition,this strategy promotes the primary particle growth,reduces the grain boundaries of secondary particles and mitigates the electrode/electrolyte interface side reactions,enhancing the structural stability and cycling life of the electrode.Accordingly,the modified sample achieved a reversible specific capacity of 198.3 mAh g-1 at 1 C(1 C=180 mA g-1)and maintained a capacity retention rate of 88.5％after 100 cycles,higher than that of the original sample(73.6％,146 mAh g-1).At the high rate of 5 C,it can maintain a high specific capacity of 178 mAh g-1(capacity retention rate of 99％)after 150 cycles.This work is a leap in ultra-high nickel-layered cathodes development and provides insights into the design of electrode materials for other batteries.

Plane-controlled growth strategyCobalt-free nickel-rich cathodeRate and cycling performancesLithium-ion battery

Hao Tong、Xun Yuan、Ningbo Qin、Yaocong Han、Yan Cheng、Fangli Ji、Ruirui Tuo、Changlang Liang、Yi Wang、Qilin Tong、Zhaozhe Yu

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Guangxi Key Laboratory of Manufacturing Systems and Advanced Manufacturing Technology,Guilin University of Electronic Technology,Guilin,541004,PR China

Guangxi CNGR New Energy Science & Technology Co.,Ltd.,Qinzhou,535000,PR China

Guangxi Institute of Science and Technology Development Co.,LTD.,Nanning,530006,PR China

School of Chemistry and Chemical Engineering,Guangxi Minzu University,Nanning,530006,PR China

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2024

10.1016/j.pnsc.2024.05.005

自然科学进展·国际材料(英文)
国家自然科学基金委员会

自然科学进展·国际材料(英文)

影响因子：0.25
ISSN：1002-0071
年,卷(期)：2024.34(3)