Hierarchical Porous and Three-Dimensional MXene/SiO<sub>2</sub> Hybrid Aerogel through a Sol-Gel Approach for Lithium–Sulfur Batteries
Jianping Zhou,
Ziyuan Pei,
Zhuyin Sui,
Ying Liang,
Xiufeng Xu,
Yongpeng Li,
Yulin Li,
Jingyi Qiu,
Qi Chen
Affiliations
Jianping Zhou
School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, China
Ziyuan Pei
School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, China
Zhuyin Sui
School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, China
Ying Liang
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Lab of Fine Chemistry, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
Xiufeng Xu
School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, China
Yongpeng Li
School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, China
Yulin Li
School of Chemistry & Chemical Engineering, Yantai University, Yantai 264005, China
Jingyi Qiu
Research Institute of Chemical Defense, Beijing 100191, China
Qi Chen
State Key Laboratory of Marine Resource Utilization in South China Sea, Hainan Provincial Key Lab of Fine Chemistry, School of Chemical Engineering and Technology, Hainan University, Haikou 570228, China
A unique porous material, namely, MXene/SiO2 hybrid aerogel, with a high surface area, was prepared via sol-gel and freeze-drying methods. The hierarchical porous hybrid aerogel possesses a three-dimensional integrated network structure of SiO2 cross-link with two-dimensional MXene; it is used not only as a scaffold to prepare sulfur-based cathode material, but also as an efficient functional separator to block the polysulfides shuttle. MXene/SiO2 hybrid aerogel as sulfur carrier exhibits good electrochemical performance, such as high discharge capacities (1007 mAh g–1 at 0.1 C) and stable cycling performance (823 mA h g–1 over 200 cycles at 0.5 C). Furthermore, the battery assembled with hybrid aerogel-modified separator remains at 623 mA h g–1 over 200 cycles at 0.5 C based on the conductive porous framework and abundant functional groups in hybrid aerogel. This work might provide further impetus to explore other applications of MXene-based composite aerogel.
