Preparation of multifunctional structural P-CF@ZnCo2O4 composites used as structural anode materials
Preparation of multifunctional structural P-CF@ZnCo2O4 composites used as structural anode materials
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DOI：
10.1016/j.jallcom.2020.155743
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发表时间：
2020-11
影响因子：
6.2
通讯作者：
Qigang Han;Xu Zhang;Wenqiang Zhang;Yao Li;Zhiqiang Zhang
中科院分区：
文献类型：
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作者：
Qigang Han;Xu Zhang;Wenqiang Zhang;Yao Li;Zhiqiang Zhang
pan基碳纤维在多功能结构复合材料中有着广泛的应用前景。其应用中的关键问题之一是如何在保持其抗拉强度的同时提高其储能能力。本文通过将ZnCo2O4薄膜紧贴在碳纤维表面，制备了一种新型的P-CF@ZnCo2O4composite （pan基碳纤维/ZnCo2O4）。由于理论容量高的znco2o4和抗拉强度强的P-CF的综合优势，制备的P-CF@ZnCo2O4composite料料综合性能优异。结果表明，在100 mA g−1电流密度下，经过150次循环后，其可逆容量保持在787.2 mAh·g−1，比纯碳纤维的153 mAh·g−1增加了近5.15倍。此外，在2000 mA g−1的密度下，放电容量仍可达到289.5 mAh·g−1，表现出优异的倍率性能。碳纤维与ZnCo2O4的协同作用是其优异的综合电化学性能的主要原因。
PAN-based carbon fibers have been studied in multifunctional structural composites with broad application prospects. One of the critical problems in their applications is how to improve their energy storage capacity while maintaining their tensile strength. In this paper, we prepared a novel P-CF@ZnCo2O4composite (PAN-based carbon fiber/ZnCo2O4) by coating ZnCo2O4thin films tightly onto the surface of carbon fibers. Due to the combined advantages of ZnCo2O4with high theoretical capacity and P-CF with strong tensile strength, the prepared P-CF@ZnCo2O4composite is expected to have outstanding comprehensive performance. As a result, a high reversible capacity of 787.2 mAh·g−1is maintained after 150 cycles at a current density of 100 mA g−1with a huge increase of almost 5.15 times as high as for the pure carbon fibers of 153 mAh·g−1. Besides, even at a density of 2000 mA g−1, the discharge capacity can still reach 289.5 mAh·g−1, showing excellent rate performance. Such superior comprehensive electrochemical characteristics can be ascribed to the synergistic effects of carbon fibers and ZnCo2O4.