TY - JOUR
T1 - Dual functional mesoporous silica colloidal electrolyte for lithium-oxygen batteries
AU - Mu, Hailiang
AU - Zhuge, Xiangqun
AU - Ren, Guogang
AU - Luo, Kun
AU - Ding, Zhengping
AU - Ren, Yurong
AU - Luo, Zhihong
AU - Bayati, Maryam
AU - Xu, Ben Bin
AU - Liu, Xiaoteng
N1 - © 2022 The Authors. Published by Elsevier B.V. This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY), https://creativecommons.org/licenses/by/4.0/
PY - 2023/1/1
Y1 - 2023/1/1
N2 - 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, 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.
AB - 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, 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.
KW - Colloidal electrolyte
KW - Cycle life
KW - Lithium-oxygen battery
KW - Mesoporous silica
UR - http://www.scopus.com/inward/record.url?scp=85143874570&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.140761
DO - 10.1016/j.cej.2022.140761
M3 - Article
AN - SCOPUS:85143874570
SN - 1385-8947
VL - 455
SP - 1
EP - 9
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
IS - Part 2
M1 - 140761
ER -