Shulan Mao, Jiahui Zhang, Jiale Mao, Zeyu Shen, Ziren Long, Shichao Zhang, Qian Wu, Hao Cheng, Yingying Lu
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引用次数: 0
Abstract
Silicon nanoparticles (SiNPs) show great promise as high-capacity anodes owing to their ability to mitigate mechanical failure. However, the substantial surface area of SiNPs triggers interfacial side reactions and solid electrolyte interphase (SEI) permeation during volume fluctuations. The slow kinetics at low temperatures and the degradation of SEI at high temperatures further hinder the practical application of SiNPs in real-world environments. Here, these challenges are addressed by manipulating the solvation structure through molecular space hindrance. The electrolyte enables anions to aggregate in the outer Helmholtz layer under an electric field, leading to rapid desolvation capabilities and the formation of anion-derived SEI. The resulting double-layer SEI, where inorganic nano-clusters are uniformly dispersed in the amorphous structure, completely encapsulates the particles in the first cycle. The ultra-high modulus of this structure can withstand stress accumulation, preventing electrolyte penetration during repeated expansion and contraction. As a result, SiNPs-based batteries demonstrate exceptional electrochemical performance across a wide temperature range from −20 to 60 °C. Moreover, the assembled 80 mAh SiNPs/LiFePO4 pouch cells maintain a cycling retention of 85.6% after 150 cycles, marking a significant step forward in the practical application of silicon-based batteries.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.