Ration Design of Mn/Si-Codoped Na3V2(PO4)3 as Cathode Na-Ion Batteries

被引：9

作者：

Li, Bei ^{[1
]}

Mei, Jianbao ^{[1
]}

Wang, Xiaomin ^{[1
]}

Shang, Chaoqun ^{[1
]}

Shen, Xueling ^{[2
]}

Hu, Pu ^{[1
]}

机构：

[1] Wuhan Inst Technol, Sch Mat Sci & Engn, Hubei Key Lab Plasma Chem & Adv Mat, Wuhan 430205, Peoples R China

[2] China Automot Battery Res Inst Co Ltd, Beijing 101400, Peoples R China

来源：

ENERGY & FUELS | 2024年 / 38卷 / 02期

基金：

中国国家自然科学基金;

关键词：

PERFORMANCE;

D O I：

10.1021/acs.energyfuels.3c03740

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

NASICON-typed Na3V2(PO4)(3) is considered the most promising cathode material for sodium-ion batteries. However, it still exhibits a limitation in terms of energy density. Herein, Mn/Si-codoped Na3.5+xV1.5Mn0.5(PO4)(3-x)(SiO4)(x) was synthesized to increase reversible capacity and operating voltage. The effects of co-substitution on structural stability and electrochemical performance are investigated. Among various doping concentrations, the optimized Na3.55Mn0.5V1.5(PO4)(2.95)(SiO4)(0.05) shows remarkably improved cyclability and reversibility. It delivers a reversible capacity of 116 mAh g(-1) at 0.2C, good cycling stability (capacity retention of 80.2% after 200 cycles), and an outstanding rate capacity of 92 mAh g(-1) at 10C.

引用

页码：1508 / 1514

页数：7

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