掺杂石墨烯/纳米硅电极材料制备及性能

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中图分类号： 文献标志码：A 文章编号：1671-0460（2026）01-0061-07

Preparation and Properties of Doped Graphene Supported Nano Silicon Electrode Materials

LI Junli’， SONG Jinling1， ZHANG Bangwen1， 2 （1.Inner Mongolia University of Science & Technology，Baotou Inner Mongolia O1401o， China： 2. Chongqing University of Science and Technology， Chongqing 401331， China）

Abstract： Graphene oxide （GO） was prepared from nature flake graphite by improved Hummers. Thre-dimensional composite electrode materials forlithium-ionbatteries，namelysulfur-doped，nitrogen-doped，and sulfur-nitrogencodoped graphene/silicon composites， were synthesized from graphene oxide，sodium sulfide，urea，and modified nanosilicon inasingle stepthrough hydrothermal process.The electrode materials were characterizedand analyzed by SEM， XRD，XPSandother techniques.The electrochemical propertiesof the electrode materials were evaluatedbyconstant current charge-discharge tests，cyclic voltammetry and other methods.The results indicated that under hydrothermal reaction conditions，the synergistic effect between sulfur and nitrogen heteroatoms created novel ithium storage sites that were not present in single-atom doping. The electrochemical performance of the sulfur-nitrogen co-doped graphene/nano-silicon composite material （SN-G@Si） wasbetter than that of single-doped materials.At a current density of 400mA⋅g-1 ，the initial specific capacity of the SN-G@Si composite material reached 2282mA⋅h⋅g-1 ，and after 100 cycles， the specific capacity still reached 1531mA⋅h⋅g-1

Key Words： Graphene; Co-doped; Nano silicon; Hydrothermal; Composites; Preparation; Lithium ion battries

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