Hebei Key Laboratory of Dielectric and Electrolyte Functional Material , Qinhuangdao 066004 , People's Republic of China.
Metallurgical Technology Research Department , Central Iron & Steel Research Institute , Beijing 100081 , People's Republic of China.
ACS Appl Mater Interfaces. 2018 Apr 4;10(13):10786-10795. doi: 10.1021/acsami.7b17597. Epub 2018 Mar 22.
In the efforts toward the rapidly increasing demands for high-power application, cathode materials with three-dimensional (3D) architectures have been proposed. Here, we report the construction of the 3D LiAlO-LiMnPO/C cathode materials for lithium-ion batteries in an innovation way. The as-prepared 3D active materials LiMnPO/C and the honeycomb-like Li-ion conductor LiAlO framework are used as working electrode directly without additional usage of polymeric binder. The electrochemical performance has been improved significantly due to the special designed core-shell architectures of LiMnPO/C@LiAlO. The 3D binder-free electrode exhibits high rate capability as well as superior cycling stability with a capability of ∼105 mAh g and 98.4% capacity retention after 100 cycles at a high discharge rate of 10 C. Such synthesis method adopted in our work can be further extended to other promising candidates and would also inspire new avenues of development of 3D materials for lithium-ion batteries.
在满足高功率应用需求的努力中，已经提出了具有三维（3D）结构的阴极材料。在这里，我们以创新的方式报告了锂离子电池 3D LiAlO-LiMnPO/C 阴极材料的构建。所制备的 3D 活性材料 LiMnPO/C 和类蜂窝状锂离子导体 LiAlO 骨架被直接用作工作电极，而无需额外使用聚合物粘合剂。由于 LiMnPO/C@LiAlO 的特殊设计的核壳结构，电化学性能得到了显著提高。3D 无粘合剂电极具有高倍率性能以及优异的循环稳定性，在 10 C 的高放电速率下，其容量约为 105 mAh g，100 次循环后容量保持率为 98.4%。我们在工作中采用的这种合成方法可以进一步扩展到其他有前途的候选材料，也将为锂离子电池的 3D 材料的发展开辟新的途径。
