Macroporous Directed and Interconnected Carbon Architectures Endow Amorphous Silicon Nanodots As Low-Strain and Fast-Charging Anode for Lithium-Ion Batteries

Overview

Journal Nanomicro Lett

Publisher Springer

Date 2024 Jan 29

PMID 38285246

Authors

Zhenwei Li

Meisheng Han

Peilun Yu

Junsheng Lin

Jie Yu

Affiliations

Soon will be listed here.

Abstract

Fabricating low-strain and fast-charging silicon-carbon composite anodes is highly desired but remains a huge challenge for lithium-ion batteries. Herein, we report a unique silicon-carbon composite fabricated by uniformly dispersing amorphous Si nanodots (SiNDs) in carbon nanospheres (SiNDs/C) that are welded on the wall of the macroporous carbon framework (MPCF) by vertical graphene (VG), labeled as MPCF@VG@SiNDs/C. The high dispersity and amorphous features of ultrasmall SiNDs (~ 0.7 nm), the flexible and directed electron/Li transport channels of VG, and the MPCF impart the MPCF@VG@SiNDs/C more lithium storage sites, rapid Li transport path, and unique low-strain property during Li storage. Consequently, the MPCF@VG@SiNDs/C exhibits high cycle stability (1301.4 mAh g at 1 A g after 1000 cycles without apparent decay) and high rate capacity (910.3 mAh g, 20 A g) in half cells based on industrial electrode standards. The assembled pouch full cell delivers a high energy density (1694.0 Wh L; 602.8 Wh kg) and an excellent fast-charging capability (498.5 Wh kg, charging for 16.8 min at 3 C). This study opens new possibilities for preparing advanced silicon-carbon composite anodes for practical applications.

Citing Articles

"Zero-Strain" NiNbO Fibers for All-Climate Lithium Storage.

Zhao Y, Yuan Q, Yang L, Liang G, Cheng Y, Wu L Nanomicro Lett. 2024; 17(1):15.

PMID: 39327350 PMC: 11427633. DOI: 10.1007/s40820-024-01497-z.

Simple and Safe Synthesis of Yolk-Shell-Structured Silicon/Carbon Composites with Enhanced Electrochemical Properties.

Li J, Wu M, Du Q, Zhai G, He H Molecules. 2024; 29(6).

PMID: 38542937 PMC: 10976018. DOI: 10.3390/molecules29061301.

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