Uncontrolled dendrite growth,sluggish reaction kinetics,and drastic side reactions on the anodeelectrolyte interface are the main obstacles that restrict the application prospect of aqueous zinc-ion batteries.Traditio...Uncontrolled dendrite growth,sluggish reaction kinetics,and drastic side reactions on the anodeelectrolyte interface are the main obstacles that restrict the application prospect of aqueous zinc-ion batteries.Traditional glass fiber(GF)separator with chemical inertness is almost ineffective in restricting these challenges.Herein,inspired by the ionic enrichment behavior of seaweed plants,a facile biomass species,anionic sodium alginate(SA),is purposely decorated on the commercial GF separator to tackle these issues towards Zn anode.Benefiting from the abundant zincophilic functional groups and superior mechanical strength properties,the as-obtained SA@GF separator could act as ion pump to boost the Zn^(2+)transference number(0.68),reduce the de-solvation energy barrier of hydrated Zn^(2+),and eliminate the undesired concentration polarization effect,which are verified by experimental tests,theoretical calculations,and finite element simulation,respectively.Based on these efficient modulation mechanisms,the SA@GF separator can synchronously achieve well-aligned Zn deposition and the suppression of parasitic side-reactions.Therefore,the Zn‖Zn coin cell integrated with SA@GF separator could yield a prolonged calendar lifespan over 1230 h(1 mA cm^(-2)and 1 mAh cm^(-2)),exhibiting favorable competitiveness with previously reported separator modification strategies.Impressively,the Zn-MnO_(2)full and pouch cell assembled with the SA@GF separator also delivered superior cycling stability and rate performance,further verifying its practical application effect.This work provides a new design philosophy to stabilize the Zn anode from the aspect of separator.展开更多
Aqueous zinc-ion batteries(AZIBs)have drawn numerous attention due to their low cost and environmental benefits.However,its commercialization process was hindered by issues,such as uncontrolled dendrite growth and par...Aqueous zinc-ion batteries(AZIBs)have drawn numerous attention due to their low cost and environmental benefits.However,its commercialization process was hindered by issues,such as uncontrolled dendrite growth and parasitic side reactions.Inspired by the natural interaction between Zn^(2+)and amino acid chains in zinc finger proteins,we introduced L-proline(LP),a cost-effective additive,into the aqueous electrolyte to stabilize the Zn anode.In combination with experiments and theoretical calculation results,it is demonstrated that the LP additive tends to reshape the hydrated Zn^(2+)solvation sheath and weaken the free H_(2)O activity,thereby restricting the water-induced parasitic reactions and drastic dendrite growth.Therefore,the Zn symmetrical cells with LP-containing electrolytes delivered an excellent superior electrochemical performance,including a long-term calendar lifespan of 3400 h at 2 mA/cm^(2) and nearly 450 h at 5 mA/cm^(2).Meanwhile,the as-assembled Zn||MnO_(2) full cells also showed desired cycling stability and rate performance with the assistance of LP additive,outperforming the ZnSO_(4) system.This intriguing bio-inspired strategy provides a valuable insight for improving the longevity of AZIBs and advancing their development in energy storage.展开更多
基金supported by research grants from the National Natural Science Foundation of China(52173235,22008193,52106110)the Key Research and Development Project of Hainan Province(ZDYF2024SHFZ038)+2 种基金Venture&Innovation Support Program for Chongqing Overseas Returnees(CX2021018)Research Foundation of Chongqing University of Science and Technology(ckrc2021071)Numerical computations were performed on Hefei Advanced Computing Center.
文摘Uncontrolled dendrite growth,sluggish reaction kinetics,and drastic side reactions on the anodeelectrolyte interface are the main obstacles that restrict the application prospect of aqueous zinc-ion batteries.Traditional glass fiber(GF)separator with chemical inertness is almost ineffective in restricting these challenges.Herein,inspired by the ionic enrichment behavior of seaweed plants,a facile biomass species,anionic sodium alginate(SA),is purposely decorated on the commercial GF separator to tackle these issues towards Zn anode.Benefiting from the abundant zincophilic functional groups and superior mechanical strength properties,the as-obtained SA@GF separator could act as ion pump to boost the Zn^(2+)transference number(0.68),reduce the de-solvation energy barrier of hydrated Zn^(2+),and eliminate the undesired concentration polarization effect,which are verified by experimental tests,theoretical calculations,and finite element simulation,respectively.Based on these efficient modulation mechanisms,the SA@GF separator can synchronously achieve well-aligned Zn deposition and the suppression of parasitic side-reactions.Therefore,the Zn‖Zn coin cell integrated with SA@GF separator could yield a prolonged calendar lifespan over 1230 h(1 mA cm^(-2)and 1 mAh cm^(-2)),exhibiting favorable competitiveness with previously reported separator modification strategies.Impressively,the Zn-MnO_(2)full and pouch cell assembled with the SA@GF separator also delivered superior cycling stability and rate performance,further verifying its practical application effect.This work provides a new design philosophy to stabilize the Zn anode from the aspect of separator.
基金financially supported by research grants from the National Natural Science Foundation of China(Nos.52307159 and 52173235)Innovative Research Group Project of National Natural Science Foundation of China(No.52021004)+3 种基金the Hainan Province Science and Technology Special Fund(No.ZDYF2024SHFZ038)Venture&Innovation Support Program for Chongqing Overseas Returnees(No.CX2021018)Research Startup Fund of Xi’an University of Architecture and Technology(No.196032407)Graduate Research and Innovation Foundation of Chongqing(No.CYB23026)。
文摘Aqueous zinc-ion batteries(AZIBs)have drawn numerous attention due to their low cost and environmental benefits.However,its commercialization process was hindered by issues,such as uncontrolled dendrite growth and parasitic side reactions.Inspired by the natural interaction between Zn^(2+)and amino acid chains in zinc finger proteins,we introduced L-proline(LP),a cost-effective additive,into the aqueous electrolyte to stabilize the Zn anode.In combination with experiments and theoretical calculation results,it is demonstrated that the LP additive tends to reshape the hydrated Zn^(2+)solvation sheath and weaken the free H_(2)O activity,thereby restricting the water-induced parasitic reactions and drastic dendrite growth.Therefore,the Zn symmetrical cells with LP-containing electrolytes delivered an excellent superior electrochemical performance,including a long-term calendar lifespan of 3400 h at 2 mA/cm^(2) and nearly 450 h at 5 mA/cm^(2).Meanwhile,the as-assembled Zn||MnO_(2) full cells also showed desired cycling stability and rate performance with the assistance of LP additive,outperforming the ZnSO_(4) system.This intriguing bio-inspired strategy provides a valuable insight for improving the longevity of AZIBs and advancing their development in energy storage.
