Carbon fiber@ pore-ZnO composite as anode materials for structural lithium-ion batteries
Carbon fiber@ pore-ZnO composite as anode materials for structural lithium-ion batteries
复制标题
碳纤维@孔-ZnO复合材料作为结构锂离子电池负极材料
DOI：
10.1016/j.jelechem.2018.11.014
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发表时间：
2019-01-15
影响因子：
4.5
通讯作者：
Wang, Limin
中科院分区：
文献类型：
--
作者：
Han, Qigang;Li, Xiang;Wang, Limin
碳纤维（CF）为结构锂离子电池（SLIB）的结构和能量功能提供了可能。SLIB中的一个棘手问题是CF的低能量密度。为了克服碳纤维的缺陷，将ZnO纳米颗粒（来自金属有机骨架（MOFs））均匀包覆在碳纤维表面，制备了一种完整的碳纤维@孔-ZnO复合材料。作为负极材料，CF@ pore-ZnO复合材料在100 mA g（-1）的电流密度下循环300次，可逆容量为510 mAh g（-1），是CF的3.42倍。此外，即使在2000 mA g（-1）的高电流密度下，在1000次循环后也可以提供395 mAh g（-1）的实质放电容量。这些良好的电化学性能的容量可以归因于高的理论比容量，所需的比表面积（多孔结构）的孔-ZnO的综合优势。这项工作提出了一个解决方案，在目前的SLIB容量的限制，当使用商业CF作为阳极材料。
The carbon fiber (CF) provides the possibility for both structural and energy functions in the structural lithium-ion batteries (SLIBs). One of the intractable problems in SLIBs is the low energy density of CF. In order to overcoming the defect of CF, an integrated CF@ pore-ZnO composite is fabricated, by using ZnO nanoparticles (from the metal organic frameworks, MOFs) uniformly coated onto the surface of CF. As an anode material, the CF@ pore-ZnO composite showing a high reversible capacity of 510 mAh g(-1) was maintained over 300 cycles at a current density of 100 mA g(-1) (3.42 times than that of CF). Furthermore, even at a high current density of 2000 mA g(-1), the substantial discharge capacity of 395 mAh g(-1) could be delivered after 1000 cycles. These good electrochemical performances in capacity can attributed to the combined superiority of the pore-ZnO with high theoretical specific capacity, desired specific surface areas (porous structure). This work presents a solution to the limitation of capacity in current SLIBs, when using commercial CF as anode materials.