井冈山大学学报（自然科学版）2025，Vol.46Issue(2)：27-34,8.DOI:10.3969/j.issn.1674-8085.2025.02.004
静电纺丝法制备钠镁双离子掺杂磷酸钒锂及电化学性能研究
PREPARATION OF SODIUM-MAGNESIUM BI-IONIC DOPED LITHIUM VANADIUM PHOSPHATE BY ELECTROSTATIC SPINNING AND ELECTROCHEMICAL PERFORMANCE
摘要
Abstract
The electrochemical performance of lithium vanadium phosphate,which has a high theoretical specific capacity and excellent ionic conductivity,is limited by its low electronic conductivity.To address this challenge,a series of Li2.97Na0.03V2-xMgx(PO4)3/C composites containing sodium and magnesium bi-ionic co-dopants are prepared by electrostatic spinning technique in this study.The materials are physically characterized by XRD,SEM and FT-IR techniques and electrochemical properties are tested by charge/discharge tests,cyclic voltammetry(CV)and alternating impedance(EIS)tests.The material prepared by the electrostatic spinning technique exhibits a micro-and nanostructure with a fiber diameter of about 200 nm.The specific capacity of discharge is 122.8 mAh/g at x=0.025 at a multiplicity of 0.1 C and the capacity retention is 97.4％after 50 cycles.At the same time the charge transfer impedance is reduced to 176.1 Q.关键词
磷酸钒锂/静电纺丝法/离子掺杂/电化学Key words
lithium vanadium phosphate/electrostatic spinning technology/ion doping/electrochemistry分类
信息技术与安全科学引用本文复制引用
李玉颖,白国梁,周学华,张涛,邓盛珏..静电纺丝法制备钠镁双离子掺杂磷酸钒锂及电化学性能研究[J].井冈山大学学报（自然科学版）,2025,46(2):27-34,8.基金项目
国家自然科学青年基金项目(52302235) （52302235）
安徽省高等学校自然科学研究重大项目(2023AH040072) （2023AH040072）
