锂离子电池富镍正极基础科学问题:晶粒形态及组装方式调控  

Basic scientific problems of nickel-rich cathode for lithium-ion battery:Morphology and accumulation regulation of primary particles

作　　者：曹梦圆 王明星 邓中莉 范未峰 向伟[1] CAO Mengyuan;WANG Mingxing;DENG Zhongli;FAN Weifeng;XIANG Wei(School of Materials,Chemistry and Chemical Engineering,Chengdu University of Technology,Chengdu 610059,China;Yibin Libao New Materials CO.,LTD,Yibin 644000,China)

机构地区：[1]成都理工大学材料与化学化工学院,成都610059 [2]宜宾锂宝材料有限公司,宜宾644000

出　　处：《复合材料学报》2023年第5期2525-2535,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(21805018);四川省科技厅应用基础研究基金(2020YJ0134)。

摘　　要：晶粒辐射状组装的富镍正极具有较常规无序多晶更优的断裂韧性和Li+扩散速率,是快充长寿命锂离子电池理想的正极材料。近年来,部分研究者报道了系列富镍正极晶粒形态及组装方式调控研究进展,所开发的辐射状富镍正极性能优异,代表着全球顶尖水平,且相关技术应用于韩国电池巨头LG化学。然而,高度辐射状富镍正极材料的合成在国内尚处于起步阶段,且尚无合成辐射状富镍正极所需晶粒形态及组装方式调控的系统阐述。本文首先介绍富镍正极晶粒形态及组装方式调控的必要性;再综述了晶粒辐射状富镍正极所需前驱体沉淀结晶与其受控锂化的研究进展,并对沉淀及高温煅烧结晶调控晶粒形态及组装方式所涉及机制进行了分析,以期为国内相关专业人员开发高端富镍正极材料提供参考。Compared with randomly oriented cathodes,nickel-rich cathodes assembled with radially oriented primary particle,which are ideal materials for fast charging and long-life lithium ion battery,have better fracture toughness and Li+diffusion rate.In recent years,Some researchers have reported a series of studies on morphology and accumulation regulation of primary particles for nickel-rich cathode.The performance of the cathodes developed by his group is excellent,representing the top level in the world,and the related technology has recently been transferred to the South Korean battery giant LG Chem.However,the synthesis of cathodes assembled with radially oriented primary particles is still in its infancy in China,and there is no systematic elaboration for the morphology and accumulation regulation of primary particles required to synthesize the nickel-rich cathode.In this paper,the necessity for the morphology and accumulation regulation of primary particles is first introduced.Then,the research progresses about the precipitation and high-temperature lithiation crystallization of precursor for the cathodes are summarized,and the mechanism involved in regulation of precipitation and high temperature calcination crystallization is analyzed.This pare is hoped to provide reference for relevant domestic specialist staff when developing high-end nickel-rich cathode materials.

关 键 词：富镍正极材料 前驱体 沉淀结晶 掺杂 辐射状 

分 类 号：TM912[电气工程—电力电子与电力传动]