In-situ Formed Ag Nanoparticle Decorated LiMn2O4 Cathodes with Outstanding Electrochemical Performance

IF 3.5 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-03-18 DOI:10.1039/d5dt00511f

Wangqiong Xu, Qiling Li, Shubiao Xia, Zhe Li, Feixiang Cheng, Shimei Guo

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引用次数: 0

Abstract

Surface coating is an effective approach to realize the commercialization of cathode materials. By now, ionically conducting surface coatings are commonly used to improve the electrochemical stability of LiMn2O4. In this work, in-situ formed Ag nanoparticles with high electronic and ionic conductivity decorated LiMn2O4 cathodes are prepared via a simple calcination process. The detailed microstructural mechanism of the influence of Ag decorated on the electrochemical performance enhancement of spinel LiMn2O4 is uncovered by spherical-aberration-corrected (Cs-corrected) scanning transmission electron microscopy (STEM). The results demonstrate that Ag coating helps to promote the transport of Li+ and strengthen cycle stability by alleviating the decomposition of electrolyte and manganese dissolution. Accordingly, the capacity retention rate of the optimized 5wt% Ag/LiMn2O4 sample reached 80% after 900 cycles with an initial discharge-specific capacity of 100 mAh g-1 at 5 C (1 C = 148 mAh g-1). This work indicates that Ag coating is a promising technology for producing high-energy density lithium-ion batteries.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.