Electrochemical controllable synthesis of MnO2 as cathode of rechargeable Zinc-ion battery

Autor:	Xiaoyong Fan, Huan Yang, Donglin Li, Jiaxing Han, Lei Gou, Ruibo Sun, Yan Wu, Kefan Ni
Rok vydání:	2020
Předmět:	Battery (electricity) Materials science Ideal (set theory) law business.industry Zinc ion Optoelectronics General Materials Science business Electrochemistry Cathode law.invention
Zdroj:	Functional Materials Letters. 13:2050011
ISSN:	1793-7213 1793-6047
DOI:	10.1142/s1793604720500113
Popis:	MnO2 has been considered as an ideal cathode for rechargeable zinc-ion battery due to its high theoretical capacity and low cost. Its electrochemical performance is strongly dependent on the crystal structure and morphology. In this work, MnO2 films are electrochemically synthesized through anodic electrodepositing at different temperatures. Their morphology evolves from nanofibers assembled pompons to nanosheet arrays upon increasing electrodepositing temperature. When evaluated as cathode of rechargeable zinc-ion battery, the MnO2 film electrode electrodeposited at 10∘C displays the best electrochemical performance due to this it shows the best morphology and electrode/electrolyte interphase stability. It can stably cycle over 1000 cycles and remains a high capacity of 102[Formula: see text]mAh[Formula: see text]g[Formula: see text] at 1.8[Formula: see text]A[Formula: see text]g[Formula: see text], and a capacity of 80[Formula: see text]mAh[Formula: see text]g[Formula: see text] at high current density of 4.5[Formula: see text]A[Formula: see text]g[Formula: see text]. This work provides a new direction to prepare MnO2 electrode with stable electrochemical cyclability.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e2fc4f1d9e6fe65998ea638181a8e5f8 https://doi.org/10.1142/s1793604720500113 Zobrazit plný text záznamu