当前位置:
X-MOL 学术
›
Adv. Mater.
›
论文详情
Our official English website, www.x-mol.net, welcomes your
feedback! (Note: you will need to create a separate account there.)
A 3D and Stable Lithium Anode for High‐Performance Lithium–Iodine Batteries
Advanced Materials ( IF 27.4 ) Pub Date : 2019-06-20 , DOI: 10.1002/adma.201902399
Kang Li 1 , Ziyu Hu 2 , Jizhen Ma 1 , Song Chen 1 , Dexu Mu 1 , Jintao Zhang 1
Advanced Materials ( IF 27.4 ) Pub Date : 2019-06-20 , DOI: 10.1002/adma.201902399
Kang Li 1 , Ziyu Hu 2 , Jizhen Ma 1 , Song Chen 1 , Dexu Mu 1 , Jintao Zhang 1
Affiliation
![]() |
Lithium metal is considered as the most promising anode material due to its high theoretical specific capacity and the low electrochemical reduction potential. However, severe dendrite problems have to be addressed for fabricating stable and rechargeable batteries (e.g., lithium–iodine batteries). To fabricate a high‐performance lithium–iodine (Li–I2) battery, a 3D stable lithium metal anode is prepared by loading of molten lithium on carbon cloth doped with nitrogen and phosphorous. Experimental observations and theoretical calculation reveal that the N,P codoping greatly improves the lithiophilicity of the carbon cloth, which not only enables the uniform loading of molten lithium but also facilitates reversible lithium stripping and plating. Dendrites formation can thus be significantly suppressed at a 3D lithium electrode, leading to stable voltage profiles over 600 h at a current density of 3 mA cm−2. A fuel cell with such an electrode and a lithium–iodine cathode shows impressive long‐term stability with a capacity retention of around 100% over 4000 cycles and enhanced high‐rate capability. These results demonstrate the promising applications of 3D stable lithium metal anodes in next‐generation rechargeable batteries.
中文翻译:
适用于高性能锂碘电池的3D稳定锂阳极
锂金属由于其较高的理论比容量和较低的电化学还原电位而被认为是最有希望的阳极材料。但是,在制造稳定的可充电电池(例如锂碘电池)时,必须解决严重的枝晶问题。制造高性能的锂碘(Li–I 2)电池,通过将熔融锂加载到掺杂有氮和磷的碳布上来制备3D稳定的锂金属阳极。实验观察和理论计算表明,N,P共掺杂大大提高了碳布的亲硫性,这不仅使熔融锂的负载均匀,而且有利于可逆的锂剥离和镀覆。因此可以在3D锂电极上显着抑制枝晶的形成,从而在电流密度为3 mA cm -2的情况下在600小时内产生稳定的电压分布。具有这种电极和锂-碘阴极的燃料电池显示出令人印象深刻的长期稳定性,在4000次循环中的容量保持率约为100%,并具有更高的高倍率能力。这些结果证明了3D稳定锂金属阳极在下一代可充电电池中的有希望的应用。
更新日期:2019-06-20
中文翻译:

适用于高性能锂碘电池的3D稳定锂阳极
锂金属由于其较高的理论比容量和较低的电化学还原电位而被认为是最有希望的阳极材料。但是,在制造稳定的可充电电池(例如锂碘电池)时,必须解决严重的枝晶问题。制造高性能的锂碘(Li–I 2)电池,通过将熔融锂加载到掺杂有氮和磷的碳布上来制备3D稳定的锂金属阳极。实验观察和理论计算表明,N,P共掺杂大大提高了碳布的亲硫性,这不仅使熔融锂的负载均匀,而且有利于可逆的锂剥离和镀覆。因此可以在3D锂电极上显着抑制枝晶的形成,从而在电流密度为3 mA cm -2的情况下在600小时内产生稳定的电压分布。具有这种电极和锂-碘阴极的燃料电池显示出令人印象深刻的长期稳定性,在4000次循环中的容量保持率约为100%,并具有更高的高倍率能力。这些结果证明了3D稳定锂金属阳极在下一代可充电电池中的有希望的应用。