用于高效锂存储的共轭微孔聚合物纳米硅集成硬碳

IF 2.7 3区化学 Q2 CHEMISTRY, ANALYTICAL

Electroanalysis Pub Date : 2024-09-11 DOI:10.1002/elan.202400287

Qiqi Shu, Qingtang Zhang, Xiaoyu Wu, Zhimin Xie, Chenli Liang, Zhengwei Xie

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引用次数: 0

摘要

为锂离子电池开发具有高容量和长循环稳定性的硅/碳复合负极是一个重大课题。然而，硅在锂化过程中的巨大体积膨胀会导致硅严重粉化，从而导致容量随循环次数的增加而严重衰减。在此，通过热解纳米硅原位包覆共轭微孔聚合物（CMP）制备了纳米硅集成硬碳（20Si@HC，20 wt.%纳米硅）。由 CMP 衍生的硬碳涂层具有发达的多孔结构，不仅能提供较高的锂存储容量，还能为纳米硅的体积膨胀提供足够的空间。当

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Nano silicon integrated hard carbon from conjugated microporous polymer for high‐efficient lithium storage

It is a significant issue to develop silicon/carbon composite anode with high‐capacity and long cycling stability for lithium‐ion batteries. However, the huge volume expansion of silicon during lithiation leads to severe pulverization of silicon, resulting in serious capacity fading over cycles. Herein, nano silicon integrated hard carbon (20Si@HC, 20 wt.% nano silicon) is prepared by pyrolyzing nano silicon in‐situ coated a conjugated microporous polymer (CMP). CMP‐derived hard carbon coating features developed porous structure, which not only deliver a high lithium storage capacity, but also provide enough space for the volume expansion of nano silicon. When

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来源期刊

Electroanalysis 化学-电化学

CiteScore

6.00

自引率

3.30%

发文量

222

审稿时长

2.4 months

期刊介绍： Electroanalysis is an international, peer-reviewed journal covering all branches of electroanalytical chemistry, including both fundamental and application papers as well as reviews dealing with new electrochemical sensors and biosensors, nanobioelectronics devices, analytical voltammetry, potentiometry, new electrochemical detection schemes based on novel nanomaterials, fuel cells and biofuel cells, and important practical applications. Serving as a vital communication link between the research labs and the field, Electroanalysis helps you to quickly adapt the latest innovations into practical clinical, environmental, food analysis, industrial and energy-related applications. Electroanalysis provides the most comprehensive coverage of the field and is the number one source for information on electroanalytical chemistry, electrochemical sensors and biosensors and fuel/biofuel cells.