Facile Fabrication of Hierarchical LiMnPO4 Microspheres for High-Performance Lithium-Ion Batteries Cathode. Issue 2 (1st January 2019)

• Record Type: Journal Article
• Authors: Li, Junzhe; Luo, Shao-hua; Wang, Qing; Yan, Shengxue; Feng, Jian; Ding, Xueyong; He, Ping; Zong, Lingbo
• Is Part Of: Journal of the Electrochemical Society. Volume 166:Issue 2(2019)
• Page Start: A118
• Page End: A124
• Publication Date: 2019-01-01
• Subjects: Batteries - Lithium -- Cathode material -- Lithium manganese phosphate -- Lithium-ion batteries; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0401902jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Developing advanced cathode materials to achieve the high-power applications is an important technology for the rechargeable lithium-ion batteries. In this work, hierarchical LiMnPO4 microspheres are designed and fabricated using MnCO3 microspheres as the self-sacrificial template. The novel hierarchical structure with high tap density and more exposed active sites is favorable for the electrolyte penetration and also provides sufficient contact areas for fast Li-ion intercalation and deintercalation reaction. In addition, the uniform thin carbon layer extending from the interior to the outside of the LiMnPO4 microsphere, could further construct a conductive and robust carbon network, which will inevitably accelerate the transport of electrons and improve the discharge capacity. Specifically, a high reversibility capacity of 158.4 mAh g −1 at 0.05 C and 104.3 mAh g −1 at 5 C is achieved. Furthermore, the superior capacity retention with 98% after 200 cycles at 5 C is maintained, revealing an excellent cycle stability. This work may open up a promising strategy to prepare other advanced electrode materials.