Ag embedded Li3VO4 as superior anode for Li-ion batteries

• Main Authors: Kang, Tao, Ni, Shibing, Chen, Qichang, Li, Tao, Chao, Dongliang, Yang, Xuelin, Zhao, Jinbao
• Other Authors: School of Physical and Mathematical Sciences
• Format: Article
• Language: English
• Published: 2019
• Subjects: DRNTU::Science::Physics; Batteries; Anode
• Online Access: https://hdl.handle.net/10356/85222; http://hdl.handle.net/10220/48380
• Institution: Nanyang Technological University

Highly conductive Ag is proven effective to improve the electrochemical performance of Li3VO4. Ag@Li3VO4 composite with unique architecture of Ag nanoparticles embedded homogeneously in Li3VO4 matrix is prepared by a facile intermediate solution method. The Ag@Li3VO4 delivers high initial discharge and charge capacities of 651 and 479 mAh g−1 at a specific current of 0.15 A g−1, maintaining of 498 and 492 mAh g−1 after 150 cycles. Superior rate capability (364 mAh g−1) can be achieved at 1.5 A g−1, with more than 5 times improvement compared the one without Ag decoration. Herein, conductive but inert Ag is found facilitating fast Li+ ion storage of the Li3VO4 owing to enhanced electronic conductivity, Li ion diffusion, and structure stability, distinctly improving cycle stability and rate performance.