Controlling the Primary Particle of High-Nickel Cobalt-Free Cathodes for Highly Stable Lithium-Ion Batteries

IF 3.2 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY
Yun-Jae Song, Hyo-Jin Ahn
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Abstract

Lithium-ion batteries (LIBs) are bright energy-storage devices owing to their superior energy density and low memory effects. High-nickel cobalt-free Li[Ni0.9Mn0.1]O2 (NM90) is a promising cathode material owing to its high energy density, low cost, and nontoxicity. However, high-Ni cathodes suffer from cation disordering and short lifecycle properties. Therefore, we fabricated well-aligned primary particles by controlling the concentration of chelating agents during co-precipitation. Appropriately aligned primary particles facilitated the transport of lithium ions, and the Mn ions in NM90 provided frameworks with highly stable structures. The fabricated NM90_4.8 M electrodes exhibited superior cathode performances, including a noticeable specific capacity of 149.9 mAh/g with an outstanding capacity retention of 87.4% after 100 cycles during a current density of 1C and a superior discharge specific capacity of 196.1 mAh/g at a current density of 0.2C. The NM90_4.8 M cathode can provide the next-generation active materials that afford long-life and ultrafast LIBs, which are discussed in terms of cost efficiency.

高稳定锂离子电池高镍无钴阴极一次颗粒的控制
锂离子电池(LIBs)由于其优越的能量密度和低记忆效应而成为一种明亮的储能装置。高镍无钴Li[Ni0.9Mn0.1]O2 (NM90)具有高能量密度、低成本、无毒性等优点,是一种很有前途的正极材料。然而,高镍阴极存在阳离子无序和生命周期短的问题。因此,我们通过控制共沉淀过程中螯合剂的浓度来制备排列良好的初级颗粒。适当排列的主粒子有利于锂离子的输运,NM90中的Mn离子提供了结构高度稳定的框架。制备的NM90_4.8 M电极具有优异的阴极性能,在1C电流密度下,比容量达到149.9 mAh/g,在100次循环后的容量保持率达到87.4%,在0.2C电流密度下的放电比容量达到196.1 mAh/g。NM90_4.8 M阴极可以提供提供长寿命和超快锂离子电池的下一代活性材料,并从成本效率方面进行了讨论。
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来源期刊
Korean Journal of Chemical Engineering
Korean Journal of Chemical Engineering 工程技术-工程:化工
CiteScore
4.60
自引率
11.10%
发文量
310
审稿时长
4.7 months
期刊介绍: The Korean Journal of Chemical Engineering provides a global forum for the dissemination of research in chemical engineering. The Journal publishes significant research results obtained in the Asia-Pacific region, and simultaneously introduces recent technical progress made in other areas of the world to this region. Submitted research papers must be of potential industrial significance and specifically concerned with chemical engineering. The editors will give preference to papers having a clearly stated practical scope and applicability in the areas of chemical engineering, and to those where new theoretical concepts are supported by new experimental details. The Journal also regularly publishes featured reviews on emerging and industrially important subjects of chemical engineering as well as selected papers presented at international conferences on the subjects.
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