Dual Functional Mesoporous Silica Colloidal Electrolyte for Lithium-Oxygen Batteries

Mu, Hailiang, Zhuge, Xiangqun, Ren, Guogang, Luo, Kun, Ding, Zhengping, Ren, Yurong, Luo, Zhihong, Bayati, Maryam, Xu, Bin and Liu, Xiaoteng (2022) Dual Functional Mesoporous Silica Colloidal Electrolyte for Lithium-Oxygen Batteries. Chemical Engineering Journal. p. 140761. ISSN 1385-8947 (In Press)

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Official URL: https://doi.org/10.1016/j.cej.2022.140761

Abstract

Dual functional mesoporous silica (mSiO2) colloidal electrolytes are promising to protect lithium anode and accelerate the reaction kinetics on cathode for lithium oxygen batteries (LOBs). In this work, we achieved a significantly extended battery life (from 55 to 328 cycles) of LOB by using mSiO2 with a concentration of 80 mg L-1 in the colloidal electrolyte, compared with the one using conventional LiClO4/DMSO electrolyte. The rate performance and full-discharge capacity are also dramatically enhanced. The as-synthesized mSiO2 has a special ordered hexagonal mesoporous structure, with a high specific surface area of 1016.30 m2 g-1, which can form a stable colloid after mixing with 1.0 M LiClO4/DMSO. The side reactions of Li stripping/plating are suppressed, thus the cycling life performance of LOB is enhanced by relieving the attack of superoxide intermediates. The co-deposition of mesoporous mSiO2 and Li2O2 also effectively accelerated the decomposition of the discharge product by promoting the mass transfer at the cathode. This investigation of suppressing side reactions using non-aqueous electrolytes will shed a new light on the design and development of novel lithium metal batteries.

Item Type: Article
Additional Information: Funding information: The authors appreciate the financial support from the National Natural Science Foundation of China (No. 51874051, 52111530139), Jiangsu Specially-Appointed Professor Fund by Jiangsu Education Department, Science and Technology Plan Project of Changzhou (No. CQ20D2EHPA034), the UK Engineering Physics and Science Research Council (Grant No. EP/S032886/1), Guangxi Natural Science Foundation (No. 2019GXNSFAA245046).
Uncontrolled Keywords: lithium-oxygen battery, colloidal electrolyte, mesoporous silica, cycle life
Subjects: F200 Materials Science
H800 Chemical, Process and Energy Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: John Coen
Date Deposited: 01 Dec 2022 08:54
Last Modified: 05 Dec 2022 09:15
URI: https://nrl.northumbria.ac.uk/id/eprint/50784

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