First Author:Xinyue Zhang

Correspondence Author:Qi Yang ,Hong-bin Sun

Co author:Guo Rongxiu ,Ai Yongjian , Jiang Tong , Wang Yao , Wang Yiming, Linshan Wang

Journal:Chemical Engineering Journal

Volume:454

DOI number:10.1016/j.cej.2022.140308

Affiliation of Author(s):Department of Chemistry, Tsinghua University

Teaching and Research Group:物理化学

Place of Publication:SWITZERLAND

Abstract:Rational design of three-dimensional(3D) composite with ordered structures and high exposure density of active sites is urgently needed in various fields, including adsorption, catalysis, and battery for energy storage. Here, we fabricate the ultra-thin MnO2 nanosheet assembly via the scabbard-like growth on 3D carbon to achieve ultra-fast adsorption for Sb(III). Among the reported antimony adsorbents to date, it shows the fastest adsorption equi librium time within 120 s. An ultra-fast mass-transfer coefficient process is achieved with 1.65 ×10 4 cm/s. It can be summarized as a rapid mass transfer process accompanied by an ultra-fast surface reaction rate, while the inner-sphere complexation by C–O and Mn–O plays essential roles in binding antimony. Prospectively, ultra- rapid adsorption is a promising way to enable high capacity and fast kinetics in the aqueous SbO2 batteries. Ascribing to the excellent conductivity produced by 3D carbon and the outstanding ultra-fast adsorption capacity generated by MnO2 assembly, the aqueous SbO2battery exhibits a high discharge capacity of 267.8 mAh/g at 2 A/g. The work will provide a promising strategy for the ultra-fast adsorption of Sb(III) and enlightenment for SbO2 based batteries.

Key Words:Antimony，3D composite，Ultra-fast adsorption，Aqueous battery

Document Code:WOS:000895272400001

Discipline:Natural Science

First-Level Discipline:Chemistry

Page Number:140308

ISSN No.:1385-8947

Translation or Not:no