期刊
ACS APPLIED MATERIALS & INTERFACES
卷 11, 期 51, 页码 47886-47893出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b15765
关键词
coral-like structure; Fe7Se8; DFT calculations; full cells; superior low-temperature performance
资金
- National Natural Science Foundation of China [21873018, 21573036, 21274017]
- open project program of Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety, Chinese Academy of Science [NSKF201807]
- Jilin Province Key Laboratory of Organic Functional Molecular Design Synthesis [130028655]
- Jilin Provincial Research Center of Advanced Energy Materials (Northeast Normal University)
The intrinsic charge-transfer property bears the primary responsibility for the sluggish redox kinetics of the common electrode materials, especially operated at low temperatures. Herein, we report the crafting of homogeneously confined Fe7Se8 nanoparticles with a well-defined graphitic carbon matrix that demonstrate a highly efficient charge-transfer system in a designed natural coral-like structure (cl-Fe7Se8(@). Notably, the intricate architecture as well as highly conductive peculiarity of C concurrently satisfy the demands of achieving fast ionic/electrical conductivities for both Li/Na-ion batteries in a wide temperature range. For example, when cl-Fe7Se8@C is employed as the anode material to assemble full batteries with the cathode of Na3V2(PO4)(2)O2F (NVPOF), decent capacities of 323.1 and 175.9 mA h g(-1) can be acquired at temperatures of 25 and -25 degrees C, respectively. This work is significant for further developing potential anode materials for advanced energy storage and conversion under low-temperature conditions.
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