Hydrogen-Bonding Crosslinking MXene to Highly Robust and Ultralight Aerogels for Strengthening Lithium Metal Anode

被引:49
|
作者
Meng, Xiangyu [1 ]
Sun, Yufeng [1 ]
Yu, Mengzhou [2 ]
Wang, Zhiyu [1 ]
Qiu, Jieshan [3 ]
机构
[1] Dalian Univ Technol, Liaoning Key Lab Energy Mat & Chem Engn, State Key Lab Fine Chem, Dalian 116024, Peoples R China
[2] Shanghai Inst Space Power Sources, State Key Lab Space Power Sources Technol, Shanghai 200245, Peoples R China
[3] Beijing Univ Chem Technol, Coll Chem Engn, Beijing 100029, Peoples R China
来源
SMALL SCIENCE | 2021年 / 1卷 / 09期
基金
中国国家自然科学基金;
关键词
highly robust Li metal anode; Li metal anode; MXene aerogels; rechargeable batteries; ultralight aerogels;
D O I
10.1002/smsc.202100021
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Li metal batteries offer the ultimate choice of high-energy power source, but suffer the performance decay and safety risk originated from notorious dendrite problem and infinite volume change of Li metal anode. Herein, it is reported to strengthen the Li metal anode by ultralight but highly robust MXene aerogels (ULRMA) with build-in strain-resistant and molecular-level lithiophilic properties. A hydrogen-bonding crosslinking strategy is developed for rapidly assembling 2D MXene to ULRMA at ambient conditions with less sacrifice of intrinsic properties of MXene. The ULRMA with an ultralow density below 10 mg cm(-3) are favorable to maximize the merit of Li metal in gravimetric energy density while offering exceptional stability of porous frameworks against mechanical strain of long-term Li plating/stripping. The lithiophilic architecture with high conductivity and hierarchical porosity further largely reduces the potential polarization and guides the pattern of Li deposition. Uptaking Li metal into ULRMA leads to a stable Li metal anode with an ultralong lifetime of 1600h with a high-rate response up to 20 mA cm(-2) and high coulombic efficiency. It yields a highly robust Li metal anode with high effectiveness in engineering stable Li-ion and Li-S batteries even paring with commercial LiFePO4 or sulfur cathode without nanostructuring.
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页数:10
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