التفاصيل البيبلوغرافية
| العنوان: |
Paradigm metallothermic-sulfidation-carbonization constructing ZIFs-derived TMSs@Graphene/CNxheterostructures for high-capacity and long-life energy storage |
| المؤلفون: |
Zhang, Junfan, Sun, Chunhao, Qu, Shuangquan, Qian, Mengmeng, Zhan, Wei, Su, Anqi, Zhang, Kai, Liu, Qi, Shao, Ruiwen, Wang, Jing, Su, Yuefeng, Huang, Jia-Qi, Wu, Feng, Tan, Guoqiang |
| المصدر: |
Nano Energy; June 2023, Vol. 111 Issue: 1 |
| مستخلص: |
Enhancing electrochemical activity and structural stability of transition metal sulfides (TMSs) are critical for improving the capacity output and retention of TMSs-based batteries. Here, we report a new paradigmatic approach for fabricating TMSs/C composites, adopting a metallothermic-sulfidation-carbonization strategy (2TM + CS2= 2TMS + C) based on zeolitic imidazolate frameworks (ZIFs) to synchronously construct a compact TMSs@Graphene/CNxtriple heterostructure. The obtained structure features crystalline TMSs nanoparticles wrapped by few-layer graphene and totally embedded within porous carbonized polyhedral frameworks. All three nanocomponents of TMSs@Graphene/CNxare connected via chemical bonding of S−C and TM−C, forming a chemical cross-linked nanostructure. Such structure design bears intrinsic advantages in improving the volumetric-efficiency for accommodating TMSs and electrical properties, enabling promising electrochemical performance in lithium- and sodium-ion storage. As a representative, the ZnS@Graphene/CNxelectrode exhibits a high capacity of 891.5 mAh g−1and an excellent retention of 80 % after 1000 cycles in lithium-ion batteries. More notably, this general metallothermic-sulfidation-carbonization mechanism can be applicable to all ZIFs, defining a new ZIFs-derived TMSs/C heterostructures. |
| قاعدة البيانات: |
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