TY - JOUR
T1 - Self-supporting scaffolds with lithiophilic gradient and polar functional groups for stable Li-S full batteries
AU - Meng, Ting
AU - Geng, Zeyu
AU - Gao, Yong
AU - Ma, Fei
AU - Wang, Xiaohan
AU - Chen, Jipeng
AU - Zhang, Haifeng
AU - Guan, Cao
N1 - Publisher Copyright:
© 2023 The Authors
PY - 2023/3
Y1 - 2023/3
N2 - Given the poor conductivity of reactants/products and the serious lithium polysulfide shuttle effect, chemical kinetic inhibition, as well as indisciplinable growth of lithium metal dendrites, the design of lithiophilicity-sulfiphilicity hosts is key to solving the problems associated with both sulfur and lithium electrodes in practical Li-S batteries. Herein, a multifunctional self-supporting scaffold (PVDF/C fiber/BN) composed of different electrospun fibers is rationally designed, which can simultaneously address the challenges of Li anodes and S cathodes. The 3D integrated scaffold has a highly promising lithiophilic-lithiophobic gradient interfacial layer, which can efficiently restrain Li dendrites growth and guarantee ultralong and stable Li plating/stripping. Furthermore, the abundant polar functional groups can provide synergistic functions such as physical restraint, chemical adsorption, and excellent electrocatalysis for LiPSs conversion. Combining these advantages, the Li-S full battery (S/PVDF/C fiber/BN || Li/PVDF/C fiber/BN) exhibits remarkable electrochemical performance, including an excellent discharge capacity of 953.3 mAh g−1 after 200 cycles at 0.5 A g−1. The designed full battery also delivers significant areal capacity (4.37 mAh cm−2 at 0.1 A g−1) even with a high loading of 6 mg cm−2. This work lays down new design ideas for making dendrite-free, high-performance Li-S full batteries.
AB - Given the poor conductivity of reactants/products and the serious lithium polysulfide shuttle effect, chemical kinetic inhibition, as well as indisciplinable growth of lithium metal dendrites, the design of lithiophilicity-sulfiphilicity hosts is key to solving the problems associated with both sulfur and lithium electrodes in practical Li-S batteries. Herein, a multifunctional self-supporting scaffold (PVDF/C fiber/BN) composed of different electrospun fibers is rationally designed, which can simultaneously address the challenges of Li anodes and S cathodes. The 3D integrated scaffold has a highly promising lithiophilic-lithiophobic gradient interfacial layer, which can efficiently restrain Li dendrites growth and guarantee ultralong and stable Li plating/stripping. Furthermore, the abundant polar functional groups can provide synergistic functions such as physical restraint, chemical adsorption, and excellent electrocatalysis for LiPSs conversion. Combining these advantages, the Li-S full battery (S/PVDF/C fiber/BN || Li/PVDF/C fiber/BN) exhibits remarkable electrochemical performance, including an excellent discharge capacity of 953.3 mAh g−1 after 200 cycles at 0.5 A g−1. The designed full battery also delivers significant areal capacity (4.37 mAh cm−2 at 0.1 A g−1) even with a high loading of 6 mg cm−2. This work lays down new design ideas for making dendrite-free, high-performance Li-S full batteries.
KW - Li plating regulation
KW - Li-S full batteries
KW - Lithiophilic gradient
KW - Polar functional groups
KW - Polysulfide redox acceleration
UR - http://www.scopus.com/inward/record.url?scp=105005264794&partnerID=8YFLogxK
U2 - 10.1016/j.nxnano.2023.100008
DO - 10.1016/j.nxnano.2023.100008
M3 - 文章
AN - SCOPUS:105005264794
SN - 2949-8295
VL - 1
JO - Next Nanotechnology
JF - Next Nanotechnology
M1 - 100008
ER -