| المؤلفون: |
Li J; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China., Li X; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China., Liu P; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China., Zhu X; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China., Ali RN; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China., Naz H; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China., Yu Y; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China., Xiang B; Hefei National Research Center for Physical Sciences at the Microscale, Department of Materials Science & Engineering, CAS Key Laboratory of Materials for Energy Conversion , University of Science and Technology of China , Hefei , Anhui 230026 , China. |
| مستخلص: |
Recently, Cu 3 P has been targeted as an alternative anode material for alkali-metal-ion batteries because of their safety potential and high volumetric capacity. However, designing a high-rate Cu 3 P electrode with long durability is still faced with huge challenges. Here, we report a self-supporting three-dimensional (3D) composite of Cu 3 P and Co 2 P interconnected by N-doped C fibers (Cu 3 P-Co 2 P/N-C). The advanced 3D structure not only provides fast reaction kinetics but also improves the structural stability, leading to excellent rate capability and long-term cycling stability, and pseudocapacitance behavior is also beneficial to the high rate performance. Additionally, the synergistic effects between Cu 3 P, Co 2 P, and N-doped carbon can increase the electrical conductivity and active sites, ensuring more ion storage. The Cu 3 P-Co 2 P/N-C anode for lithium-ion batteries delivers high discharge capacity, superior rate performance, and ultralong lifespan over 2000 cycles accompanied by a stable capacity of around 316.9 mAh/g at 5 A/g. When the 3D structured material works in sodium-ion batteries, it also displays improved electrochemical performance. Our method provides a new insight to design advanced metal phosphides anodes for energy storage devices. |
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