Printed zinc ion battery with excellent rate performance utilizing carbon-intercalated vanadium oxide cathode for flexible wearable electronics

IF 8.1 2区 工程技术 Q1 CHEMISTRY, PHYSICAL
Weinan Tang, Quancai Li, Hehe Ren, Ziyi Gong, Qun Liu, Jing Liang, Wei Wu
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Abstract

Rechargeable aqueous Zn-ion batteries (AZIBs) are considered as promising practical energy storage devices for flexible electronics due to their natural safety, eco-friendliness, and the abundant mineral resources of Zn. However, the poor capacity and unsatisfactory cycle stability at high current densities hinder the practical application of flexible ZIBs. Herein, a nitrogen-doped carbon intercalated vanadium oxide (CNVO) nanosheets are synthesized by introducing polyaniline into vanadium oxide interlayers and in-situ carbonization. The incorporation of nitrogen-doped carbon improves the conductivity of CNVO via π-d conjugation and facilitates Zn2+ migration by expanding the interlayer spacing. Moreover, the substantial specific surface area and the abundant oxygen vacancy defects of CNVO, furnishes numerous active sites for Zn2+ intercalation, significantly enhancing the pseudocapacitive performance and resulting in excellent high-rate capabilities. Consequently, the CNVO//Zn battery exhibits a discharge capacity of up to 200 mAh g−1 even at a high current density of 10 A g−1 and long-term durability of 2000 cycles. Furthermore, a flexible CNVO//Zn battery is fabricated using screen printing technology, demonstrating an energy density of 2.03 mWh cm−2 and a power density of 1.37 mW cm−2.

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来源期刊
Journal of Power Sources
Journal of Power Sources 工程技术-电化学
CiteScore
16.40
自引率
6.50%
发文量
1249
审稿时长
36 days
期刊介绍: The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells. Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include: • Portable electronics • Electric and Hybrid Electric Vehicles • Uninterruptible Power Supply (UPS) systems • Storage of renewable energy • Satellites and deep space probes • Boats and ships, drones and aircrafts • Wearable energy storage systems
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