With the rapid development of portable and wearable electronics,energy storage devices featuring high energy and power densities,long-cycle lifetime,environment friendliness,safe operation,lightweight,ultrathin thickn...With the rapid development of portable and wearable electronics,energy storage devices featuring high energy and power densities,long-cycle lifetime,environment friendliness,safe operation,lightweight,ultrathin thickness and flexibilityl have become increasingly important.Herein,a high-performance flexible quasi-solid-state Ni-Fe battery was rationally developed by engineering the surfaces ofα-Fe_(2)O_(3)nanorods(NRs)and NiCo_(2)O_(4)nanowire arrays(NWAs)as the anode and cathode,respectively.Benefiting from the flexible current collector,fast charge transport,rapid ion diffusion,and sufficient electroactive sites,this flexible quasi-solid-state Ni-Fe battery presents outstanding capacity as high as 134.5 mA h g^(-1).Furthermore,this battery also has long cycling life,and could be cycled up to 2600 times with 82.7%capacity retention.Most importantly,the as-fabricated flexible quasi-solid-state Ni-Fe battery achieves an admirable energy density of 227 W h kg^(-1),together with a peak power density of 23.4 kW kg^(-1),thus outperforming the most recently reported Ni-Fe batteries and other flexible energy storage devices.Coupled with the advantages of admirable energy density and durability,this highly flexible and rechargeable Ni-Fe battery will greatly enrich the energy storage technologies for future flexible electronic device applications.展开更多
基金supported by the Science and Technology Planning Project of Guangzhou(201804010196)Guangdong Province Higher Vocational Colleges&Schools Pearl River Scholar Funded Scheme(2015)+8 种基金Natural Science Foundation of Guangdong Province(2016A030313761)Guangdong Natural Science Funds for Distinguished Young Scholar(2014A030306048)Science and Technology Planning Project of Guangzhou(201510010170)Talents Project of Guangdong Industry Polytechnic(KYRC2017-0025)Science and Technology Planning Project of Foshan(2017AB003922)Foshan research center for special functional building materials and its green preparation technology(2017-203)Opening Foundation of MOE Key Laboratory of Bioinorganic and Synthetic Chemistry Sun Yat-Sen University(2016)the Pearl River Scholar Foundation of Guangdong Industry Polytechnic(RC2015-001)Education Commission of Guangdong Province(2017GkQNCX002,2017GKCXTD001).
文摘With the rapid development of portable and wearable electronics,energy storage devices featuring high energy and power densities,long-cycle lifetime,environment friendliness,safe operation,lightweight,ultrathin thickness and flexibilityl have become increasingly important.Herein,a high-performance flexible quasi-solid-state Ni-Fe battery was rationally developed by engineering the surfaces ofα-Fe_(2)O_(3)nanorods(NRs)and NiCo_(2)O_(4)nanowire arrays(NWAs)as the anode and cathode,respectively.Benefiting from the flexible current collector,fast charge transport,rapid ion diffusion,and sufficient electroactive sites,this flexible quasi-solid-state Ni-Fe battery presents outstanding capacity as high as 134.5 mA h g^(-1).Furthermore,this battery also has long cycling life,and could be cycled up to 2600 times with 82.7%capacity retention.Most importantly,the as-fabricated flexible quasi-solid-state Ni-Fe battery achieves an admirable energy density of 227 W h kg^(-1),together with a peak power density of 23.4 kW kg^(-1),thus outperforming the most recently reported Ni-Fe batteries and other flexible energy storage devices.Coupled with the advantages of admirable energy density and durability,this highly flexible and rechargeable Ni-Fe battery will greatly enrich the energy storage technologies for future flexible electronic device applications.
