Rigid Polyimide Buffering Layer Enabling Silicon Nanoparticles Prolonged Cycling Life for Lithium Storage
Source abstract
Abstract
Structural design is an effective avenue to alleviate the volume expansion of silicon anode. Surface coating and/or encapsulation shows a significant advantage. However, most coating layers show poor mechanical strength, resulting in fast fading electrochemical performance. In this work, commercial silicon nanoparticles coated with polyimide (PI) film have been synthesized by a simple mechanical stirring process. The polyimide polymer film endows silicon with structural characteristics of intrinsic high ionic conductivity, a stable SEI layer, and structure rigidness. The resulting composites display excellent capacity retention with about 1144 mAh g–1 after 430 cycles at 1 A g–1. The LiCoO2/Si@PI-15% full cell displays a high initial capacity of ∼126 mAh g–1 based on the cathode mass. After 50 cycles, it delivers 55 mAh g–1 reversible capacity with an average CE of ∼98% at 140 mA g–1.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Supercapacitor Materials and Fabrication
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Material Science and Engineering, Jiangsu Key Laboratory of Materials and Technology for Energy Conversion & Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Funding
Foundation of the Graduate Innovation Center, Nanjing University of Aeronautics and Astronautics · Ministry of Science and Technology of the People's Republic of China · Natural Science Foundation of Jiangsu Province · National Natural Science Foundation of China · Cooperative Innovation Fund of Jiangsu Province · Priority Academic Program Development of Jiangsu Higher Education Institutions
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