Covalent Selenium Embedded in Hierarchical Carbon Nanofibers for Ultra-High Areal Capacity Li-Se Batteries
Jian Zhou,
Maoxin Chen,
Tao Wang,
Shengyang Li,
Qiusheng Zhang,
Meng Zhang,
Hanjiao Xu,
Jialing Liu,
Junfei Liang,
Jian Zhu,
Xiangfeng Duan
Affiliations
Jian Zhou
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Maoxin Chen
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Tao Wang
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Shengyang Li
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Qiusheng Zhang
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Meng Zhang
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Hanjiao Xu
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Jialing Liu
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China
Junfei Liang
Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA; School of Energy and Power Engineering, North University of China, Taiyuan, Shanxi 030051, P. R. China
Jian Zhu
State Key Laboratory for Chemo/Biosensing and Chemometrics, College of Chemistry and Chemical Engineering, and Hunan Key Laboratory of Two-Dimensional Materials, Hunan University, Changsha 410082, P. R. China; Corresponding author
Xiangfeng Duan
Department of Chemistry and Biochemistry, University of California, Los Angeles, CA 90095, USA
Summary: Lithium selenium (Li-Se) batteries have attracted increasing interest for its high theoretical volumetric capacities up to 3,253 Ah L−1. However, current studies are largely limited to electrodes with rather low mass loading and low areal capacity, resulting in low volumetric performance. Herein, we report a design of covalent selenium embedded in hierarchical nitrogen-doped carbon nanofibers (CSe@HNCNFs) for ultra-high areal capacity Li-Se batteries. The CSe@HNCNFs provide excellent ion and electron transport performance, whereas effectively retard polyselenides diffusion during cycling. We show that the Li-Se battery with mass loading of 1.87 mg cm−2 displays a specific capacity of 762 mAh g−1 after 2,500 cycles, with almost no capacity fading. Furthermore, by increasing the mass loading to 37.31 mg cm−2, ultra-high areal capacities of 7.30 mAh cm−2 is achieved, which greatly exceeds those reported previously for Li-Se batteries. : Energy Storage; Materials Characterization Techniques; Nanostructure Subject Areas: Energy Storage, Materials Characterization Techniques, Nanostructure
