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Synthesis and Characteristics of Lithium-Rich Manganese-Based Material Li[Li0.2Ni0.2Mn0.6]O2 by in Situ Template-Sacrificial Method
Received date: 2016-11-24
Revised date: 2016-12-26
Online published: 2017-02-28
Li[Li0.2Ni0.2Mn0.6]O2 (LLO) nanoparticles with diffident morphologies were prepared by the in situ template- sacrificial method, sol-gel method and confinement method, respectively. The electrochemical performance data confirmed that the product prepared by in situ template-sacrificial method had the best specific capacity, cycle stability and rate performance. The improved electrochemical performance of this product is due to the following aspects: (1) the cavity in each hollow sphere can provide many extra active sites for the storage of Li+, which is beneficial for enhancing the specific capacity; (2) the hollow structure made of nanoparticles often has a larger surface area and a reduced effective diffusion distance for Li+, leading to improved rate capability; (3) the void space in hollow structures may buffer against the local volume change during the lithium insertion/extraction cycling, thus facilitating the structural stability of the electrode material and improving the cyclability.
LIU Yan , TANG Dao-ping , ZHANG Qian-yu , ZHANG Ling-zhi . Synthesis and Characteristics of Lithium-Rich Manganese-Based Material Li[Li0.2Ni0.2Mn0.6]O2 by in Situ Template-Sacrificial Method[J]. Advances in New and Renewable Energy, 2017 , 5(1) : 32 -39 . DOI: 10.3969/j.issn.2095-560X.2017.01.005
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