Mg2+ Ion Pre-Insertion Boosting Reaction Kinetics and Structural Stability of Ammonium Vanadates for High-Performance Aqueous Zinc-Ion Batteries

被引：17

作者：

Tang, Han ^{[1
]}

Chao, Feiyang ^{[1
]}

Luo, Hongyu ^{[1
]}

Yu, Kesong ^{[2
]}

Wang, Juan ^{[1
]}

Chen, Huibiao ^{[1
]}

Jia, Runmin ^{[1
]}

Xiong, Fangyu ^{[2
]}

Pi, Yuqiang ^{[3
]}

Luo, Ping ^{[1
]}

An, Qinyou ^{[2
]}

机构：

[1] Hubei Univ Technol, Hubei Prov Key Lab Green Mat Light Ind, Hubei Engn Lab Automot Lightweight Mat & Proc, New Mat & Green Mfg Talent Intro & Innovat Demonst, Wuhan 430068, Peoples R China

[2] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Hubei, Peoples R China

[3] Hubei Engn Univ, Sch Chem & Mat Sci, Wuhan 432000, Hubei, Peoples R China

来源：

CHEMSUSCHEM | 2023年 / 16卷 / 15期

基金：

中国国家自然科学基金;

关键词：

ammonium vanadates; aqueous zinc-ion batteries; cathodes; reaction kinetics; structural stability; HIGH-CAPACITY; CATHODE; INTERCALATION; ENERGY;

D O I：

10.1002/cssc.202300403

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Aqueous zinc-ion batteries (AZIBs) attract much attention owing to their high safety, environmentally friendliness and low cost. However, the unsatisfactory performance of cathode materials is one of the unsolved important factors for their widespread application. Herein, we report NH4V4O10 nanorods with Mg2+ ion preinsertion (Mg-NHVO) as a high-performance cathode material for AZIBs. The preinserted Mg2+ ions effectively improve the reaction kinetics and structural stability of NH4V4O10 (NHVO), which are confirmed by electrochemical analysis and density functional theory calculations. Compared with pristine NHVO, the intrinsic conductivity of Mg-NHVO is improved by 5 times based on the test results of a single nanorod device. Besides, Mg-NHVO could maintain a high specific capacity of 152.3 mAh g(-1) after 6000 cycles at the current density of 5 A g(-1), which is larger than that of NHVO (only exhibits a low specific capacity of 30.5 mAh g(-1) at the same condition). Moreover, the two-phase crystal structure evolution process of Mg-NHVO in AZIBs is revealed. This work provides a simple and efficient method to improve the electrochemical performance of ammonium vanadates and enhances the understanding about the reaction mechanism of layered vanadium-based materials in AZIBs.

引用

页数：9