DataVXACS Applied Nano MaterialsPaper
journal article·2024-05-10

Si@Nitrogen-Doped Carbon Nanoparticles for Lithium-Ion Battery Anodes

Wanwen Huang, Jie Gao, Lei Miao, Jianhua Zhou, Guodong Yang, Wenping Liu, Yuanyuan Jiang, Haiqing Qin, Zhenjun Zhang, Xiaoxu Lei, Anjun Lu, Zuxue Mo, Dongmei Zhang, Feng Dang

ACS Applied Nano Materials· Volume 7· Issue 9
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Source abstract

Abstract

The formation of a core–shell structure by coating silicon (Si) nanoparticles with a carbon layer is considered a promising method to address the poor conductivity of a Si-based anode and volume expansion of silicon particles during the charging/discharging process. However, Si/C composite anodes usually perform below expectations with a single layer of carbon utilized as the coating layer, while introducing multilayer carbon coating results in the additional complexity and cost. To overcome this challenge, in this work, waterborne polyurethane (WPU) had been simply mixed with the Si nanoparticles to form the Si/WPU composite via the hydrogen bonds, and the core–shell structure with the single carbon layer containing N atoms (Si@NC) was obtained after the pyrolysis of the composite. The carbon layer not only significantly alleviated the breakage of the anode caused by the volume expansion of Si nanoparticles but also optimized the rate performance of the anode. At a current density of 0.5 A g –1, the discharge specific capacity of the Si@NC anode is still as high as 945.63 mAh g –1 after 300 cycles, surpassing various single-layer carbon and multilayer carbon-coated Si-based anodes. This work provides a convenient and feasible method for preparing economical Si/C composite anode materials.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storageNanomaterialsComposites

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Technologies Research · Supercapacitor Materials and Fabrication

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Guangxi Key Laboratory of Information Materials, Guangxi Collaborative Innovation Center of Structure and Property for New Energy Materials, Guilin University of Electronic Technology, Guilin 541004, P. R. China

Guangxi Key Laboratory for Relativity Astrophysics, State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, School of Physical Science and Technology, Guangxi University, Nanning 530004, P. R. China

Guangxi Key Laboratory of Superhard Material, National Engineering Research Center for Special Mineral Material, Guangxi Technology Innovation Center for Special Mineral Material, China Nonferrous Metal (Guilin) Geology and Mining Co., Ltd., Guilin 541004, P. R. China

Key Laboratory for Liquid−Solid Structure Evolution and Processing of Materials (Ministry of Education), Shandong University, Jinan 250061, P. R. China

Funding

National Natural Science Foundation of China · Innovation Project of GUET Graduate Education · Scientific and Technological Plan of Guilin City · Guangxi Science and Technology Project

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