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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Enhancement of the high potential specific charge in layered electrode materials for lithium-ion batteries
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Enhancement of the high potential specific charge in layered electrode materials for lithium-ion batteries

机译：增强锂离子电池层状电极材料中的高电势比电荷

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摘要

Among the layered transition metal oxide electrodes, the NCA {Li(Ni_(1-x-y)Co_xAl_t)O2) and the NMC (Li_(1-a)(Ni_xMn_yCo_z)_(1-δ)O2) families with working potentials ranging from 4 V to close to 5 V against Li metal are nowadays identified as potential high specific energy materials. The present candidates have their advantages and drawbacks, i.e. NCA is a high energy density material but safety is of major concern while NMC has a lower energy density but exhibits improved safety. Recently, overlithiated layered transition metal oxides have proved to deliver reversible specific charge over 200 mA h g~(-1). The high specific charge is associated with a complex reaction mechanism that involves the activation of the material at high potentials. However, further R&D is needed for the current technology to meet the needs, in terms of safety, cost, energy and power capabilities, of the emerging HEV and EV market. A review of the state-of-the-art of these families of compounds together with current approaches for their future development is presented.
机译：在层状过渡金属氧化物电极中，NCA {Li（Ni_（1-xy）Co_xAl_t）O2）和NMC（Li_（1-a）（Ni_xMn_yCo_z）_（1-δ）O2）的工作电位范围为如今，相对于锂金属的4 V至接近5 V被确定为潜在的高比能量材料。本发明的候选方案具有其优点和缺点，即，NCA是高能量密度的材料，但是安全性是主要关注的问题，而NMC具有较低的能量密度，但是具有改善的安全性。近来，已证明过锂化的层状过渡金属氧化物可在200 mA h g〜（-1）范围内传递可逆的比电荷。高的比电荷与复杂的反应机理有关，该机理涉及高电位下材料的活化。但是，当前的技术需要进一步的研发，以满足新兴的混合动力汽车和电动汽车市场在安全性，成本，能源和动力能力方面的需求。本文介绍了这些化合物家族的最新技术以及其未来开发的当前方法。

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