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| 1 | A zincophilic molecular brush for a dendrite-free,corrosionresistant,zinc metal anode with a long life cycle显示文摘Zinc-based aqueous rechargeable batteries have attracted extensive attention due to their low cost,safety,and environmental friendliness.However,dendrite growth and hydrogen evolution of Zn anodes limit their large-scale application.A new strategy to produce a polyacrylamide/reduced graphene oxide(PAM@rGO)molecular nanobrush coating and control Zn electrolyte interface engineering is proposed for use in highly reversible Zn plating/stripping.Hydrogen evolution is inhibited,and Zn deposition is consolidated using the rich zincophilic functional groups of the branched polyacrylamide chain and the high conductivity of rGO.Due to the synergistic effects of corrosion resistance and dendrite-free growth,PAM@rGO/Zn provides prolonged and reversible Zn plating/stripping.Density functional theory(DFT)calculations expand on homogenized nucleation.The PAM@rGO/Zn||activated carbon(AC)capacitor exhibits long cyclic stability,fast ion transfer,and minimal interfacial impedance.This study provides experimental and theoretical bases for the structural design of Zn anode. | Penggao Liu Jia Guo Xinyue Chen Ting Wang Yanping Huang Shasha Gao Tao Wang Dongling Wu Kaiyu Liu | 2024 | Nano Research2024，17，1： | 0 |
| 2 | Highly reversible and long-lived zinc anode assisted by polymer-based hydrophilic coating显示文摘Rechargeable aqueous zinc-ion batteries(AZIBs)are the most promising candidates for the energy storage due to their high safety,rich resources,and large specific capacity.However,AZIBs using neutral or slightly acidic electrolytes still face side effects and zinc dendrites on the anode surface.To stabilize the Zn anode,a chemically stable and multi-functional coating of polyvinylidene fluoride(PVDF)and 4,4′-(hexafluoroisopropylidene)diphthalic anhydride(6FDA)was prepared on the Zn surface.The anhydride groups in 6FDA can improve the hydrophilicity,promoting the migration of zinc ions.Besides,PVDF is compatible with 6FDA because of the presence of organic F-containing groups,which can also effectively reduce the nucleation overpotential and exhibit the dendrite-free Zn deposition/stripping.The PVDF/6FDA@Zn symmetric cell can cycle for 5000 h at a current density of 0.5 mA·cm^(−2),maintaining the extremely low polarization voltage and overpotential of 28 and 8 mV,respectively.The PVDF/6FDA@Zn||MnO2 full cell can remain a specific capacity of~90 mAh·g^(−1)after 2000 cycles at 1.5 A·g^(−1).This simple method achieves a reversible Zn anode,providing an inspiring strategy for ultra-long-cycle AZIBs. | Hang Chen Xinghan Yuan Hongmei Qin Chuanxi Xiong | 2023 | Frontiers of Materials Science2023，17，4： | 0 |
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