Atomic layer deposition of core-shell structured V₂O₅@CNT sponge as cathode for potassium ion batteries

verfasst von

Fangliang Ye, Dongwei Lu, Xuchun Gui, Tengrui Wang, Xiaoying Zhuang, Wei Luo, Yunhui Huang

Abstract

Potassium-ion batteries (KIBs) represent one of the most promising alternatives to lithium-ion batteries (LIBs) considering the potential low cost and abundant potassium resource. In this work, we demonstrate a core-shell structured sponge cathode for KIBs, where amorphous V₂O₅ uniformly coats on carbon nanotube (CNT) sponge via atomic layer deposition (ALD). The V₂O₅@CNT sponge shows several advantages as cathode: (1) the three-dimensional (3D) conductive network of CNT sponge offers a fast electron transport pathway, (2) the porous nature and high surface area of CNT sponge enables enough access for electrolyte to V₂O₅, (3) the amorphous structure of V₂O₅ offers a fast kinetics upon K-ion insertion/deinsertion. The V₂O₅@CNT sponge cathode delivers a high capacity of 206 mA h/g and moderate cycling and rate performance in common carbonate-based electrolyte system.

Externe Organisation(en)

Tongji University
Sun Yat-Sen University

Typ

Artikel

Journal

Journal of Materiomics

Band

5

Seiten

344-349

Anzahl der Seiten

6

ISSN

2352-8478

Publikationsdatum

28.05.2018

Publikationsstatus

Veröffentlicht

Peer-reviewed

Ja

ASJC Scopus Sachgebiete

Elektronische, optische und magnetische Materialien, Oberflächen, Beschichtungen und Folien, Metalle und Legierungen

Ziele für nachhaltige Entwicklung

SDG 7 – Erschwingliche und saubere Energie

Elektronische Version(en)

https://doi.org/10.1016/j.jmat.2018.05.009 (Zugang: Offen)