Abstract
Owing to high safety, low cost, nontoxicity, and environment-friendly features, LiFePO 4 that is served as the lithium ion battery cathode has attracted much attention. In this paper, a novel 3D LiFePO 4@C core-shell configuration anchored on carbon cloth is synthesized by a facile impregnation sol-gel approach. Through the binder-free structure, the active materials can be directly combined with the current collector to avoid the falling of active materials and achieve the high-efficiency lithium ion and electron transfer. The traditional slurry-casting technique is applicable for pasting LiFePO 4@C powders onto the 2D aluminum foil current collector (LFP-Al). By contrast, LFP-CC exhibits a reversible specific capacity of 140 mAh·g -1 and 93.3 mAh·g -1 at 1C and 10C, respectively. After 500 cycles, no obvious capacity decay can be observed at 10C while keeping the coulombic efficiency above 98%. Because of its excellent capacity, high-rate performance, stable electrochemical performance, and good flexibility, this material has great potentials of developing the next-generation high-rate performance lithium ion battery and preparing the binder-free flexible cathode.
Original language | English |
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Article number | 2607017 |
Number of pages | 11 |
Journal | Journal of Nanomaterials |
Volume | 2020 |
DOIs | |
Publication status | Published - 30 Apr 2020 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2020 Boqiao Li et al.
Funding
Supported by Key R&D Program of Shaanxi 2018ZDXM-GY-131 (11872302), National Natural Science Foundation of China (11572238), and Columbia University.