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Assembly of GO Nanosheets–Coated Zeolitic Imidazolate Framework‐67 Nanocubes via Electrospinning and Their Derivatives for Enhanced Lithium‐Ion Storage Performance
Energy Technology ( IF 3.6 ) Pub Date : 2020-04-29 , DOI: 10.1002/ente.202000209 Hao Li 1 , Bing-Rong Lu 1 , Wu-Di Zhang 1 , Fu-Hu Cao 1 , Hao Li 2 , Chuan-Ling Zhang 1
Energy Technology ( IF 3.6 ) Pub Date : 2020-04-29 , DOI: 10.1002/ente.202000209 Hao Li 1 , Bing-Rong Lu 1 , Wu-Di Zhang 1 , Fu-Hu Cao 1 , Hao Li 2 , Chuan-Ling Zhang 1
Affiliation
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Zeolitic imidazolate framework‐67 (ZIF‐67)‐derived Co3O4/N‐doped porous carbon hybrids have drawn great attention as anode materials for lithium‐ion batteries (LIBs) because of their unique advantages. Herein, based on the electrospinning‐assisted assembly method, two strategies are used to further enhance the stability and capacity of the anodes; one is increasing the crystallinity of ZIF‐67 nanocubes (NCs) to raise the specific surface area and porosity, and the other is coating GO nanosheets on the surfaces of ZIF‐67 (ZIF‐67@GO) to improve the conductivity and capacity and buffer the sintering during the cycling process. After electrospinning of ZIF‐67@GO NCs followed by a two‐step thermal treatment, hollow Co3O4 nanoparticles encapsulated N‐doped porous carbon nanofibers with high graphitization degree are constructed (ES‐CNCo3O4@rGO). When applied as the anode for LIBs, the ES‐CNCo3O4@rGO electrode exhibits excellent rate capability and high specific capacity as well as stable cycling performance (1315 mAh g−1 after 100 cycles at 0.1 A g−1 and 1234 mAh g−1 after 500 cycles at 1 A g−1).
中文翻译：
通过静电纺丝组装GO纳米片–涂覆的沸石咪唑盐骨架-67纳米立方体及其衍生物，以增强锂离子存储性能
沸石咪唑酸酯骨架67（ZIF 67）衍生的Co 3 O 4 / N掺杂多孔碳杂化材料因其独特的优势而作为锂离子电池（LIB）的负极材料备受关注。在此，基于电纺丝辅助组装方法，使用两种策略来进一步提高阳极的稳定性和容量。一种是增加ZIF-67纳米晶（NC）的结晶度以提高比表面积和孔隙率，另一种是在ZIF-67（ZIF-67 @ GO）表面上涂覆GO纳米片以提高电导率和容量，以及在循环过程中缓冲烧结。ZIF-67 @ GO NC的静电纺丝后，经过两步热处理，空心Co 3 O 4构建了纳米颗粒包裹的，具有高石墨化度的N掺杂多孔碳纳米纤维（ES- CNCo 3 O 4 @rGO）。当用作LIB的阳极时，ES‐ CNCo 3 O 4 @rGO电极表现出出色的速率能力和高比容量以及稳定的循环性能（在0.1 A g -1和1234 mAh下100次循环后为1315 mAh g -1在1 A g -1下经过500次循环后的g -1）。
更新日期：2020-07-02
中文翻译：
通过静电纺丝组装GO纳米片–涂覆的沸石咪唑盐骨架-67纳米立方体及其衍生物，以增强锂离子存储性能
沸石咪唑酸酯骨架67（ZIF 67）衍生的Co 3 O 4 / N掺杂多孔碳杂化材料因其独特的优势而作为锂离子电池（LIB）的负极材料备受关注。在此，基于电纺丝辅助组装方法，使用两种策略来进一步提高阳极的稳定性和容量。一种是增加ZIF-67纳米晶（NC）的结晶度以提高比表面积和孔隙率，另一种是在ZIF-67（ZIF-67 @ GO）表面上涂覆GO纳米片以提高电导率和容量，以及在循环过程中缓冲烧结。ZIF-67 @ GO NC的静电纺丝后，经过两步热处理，空心Co 3 O 4构建了纳米颗粒包裹的，具有高石墨化度的N掺杂多孔碳纳米纤维（ES- CNCo 3 O 4 @rGO）。当用作LIB的阳极时，ES‐ CNCo 3 O 4 @rGO电极表现出出色的速率能力和高比容量以及稳定的循环性能（在0.1 A g -1和1234 mAh下100次循环后为1315 mAh g -1在1 A g -1下经过500次循环后的g -1）。
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