Yuning Han , Gong-rui Wang , Xuan-xuan Ren , Ming-zhe Yang , Zhong-tao Li , Zhong-shuai Wu
{"title":"High specific-energy lithium-rich manganese-based layered oxide cathodes: key challenges, modification strategies and future prospects","authors":"Yuning Han , Gong-rui Wang , Xuan-xuan Ren , Ming-zhe Yang , Zhong-tao Li , Zhong-shuai Wu","doi":"10.1016/S1872-5805(25)60996-6","DOIUrl":null,"url":null,"abstract":"<div><div>Lithium-rich manganese-based layered oxides (LRMOs) have the advantages of a high specific capacity, a high working voltage, and low cost, making them promising candidates for the cathode materials of next-generation high-energy lithium-ion batteries. However, they still have problems such as low initial Coulombic efficiency, poor rate capability, and fast voltage decay, which prevent them from meeting the demanding requirements of lithium-ion batteries in high-end applications such as aerospace, medical equipment, and advanced electric vehicles. To gain a comprehensive understanding of LRMOs, this review discusses their crystal structure, major problems, and main ways of modification, and provides an outlook on their future. First, the crystal structure and energy storage mechanism of LRMOs are described in detail, and the key challenges they face are discussed, including densification of the crystal structure caused by irreversible reactions in the bulk and surface, and their loss of electrochemical performance (voltage decay, reduced initial coulombic efficiency, and poor rate capability). Strategies for modifying LRMOs are summarized and explored, including increasing the lithium-ion diffusion rate and improving crystal structure stability by elemental doping. The suppression of harmful side reactions between them and the electrolyte by surface coating during cycling (including phosphate coating, carbon coating, metal oxide coating, and conductive polymer coating) to improve structural stability is discussed, as are means of improving their interfacial stability with solid/liquid electrolytes by modifying the electrolyte, in order to boost their cycling performance. Their electrochemical performance can also be improved by binder optimization. The review concludes by considering their future prospects, and provides detailed guidance for the rational design and scalable production of next-generation LRMO cathode materials for highenergy-density lithium-ion batteries.\n\t\t\t\t<span><figure><span><img><ol><li><span><span>Download: <span>Download high-res image (74KB)</span></span></span></li><li><span><span>Download: <span>Download full-size image</span></span></span></li></ol></span></figure></span></div></div>","PeriodicalId":19719,"journal":{"name":"New Carbon Materials","volume":"40 3","pages":"Pages 597-620"},"PeriodicalIF":5.7000,"publicationDate":"2025-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Carbon Materials","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1872580525609966","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Materials Science","Score":null,"Total":0}
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Abstract
Lithium-rich manganese-based layered oxides (LRMOs) have the advantages of a high specific capacity, a high working voltage, and low cost, making them promising candidates for the cathode materials of next-generation high-energy lithium-ion batteries. However, they still have problems such as low initial Coulombic efficiency, poor rate capability, and fast voltage decay, which prevent them from meeting the demanding requirements of lithium-ion batteries in high-end applications such as aerospace, medical equipment, and advanced electric vehicles. To gain a comprehensive understanding of LRMOs, this review discusses their crystal structure, major problems, and main ways of modification, and provides an outlook on their future. First, the crystal structure and energy storage mechanism of LRMOs are described in detail, and the key challenges they face are discussed, including densification of the crystal structure caused by irreversible reactions in the bulk and surface, and their loss of electrochemical performance (voltage decay, reduced initial coulombic efficiency, and poor rate capability). Strategies for modifying LRMOs are summarized and explored, including increasing the lithium-ion diffusion rate and improving crystal structure stability by elemental doping. The suppression of harmful side reactions between them and the electrolyte by surface coating during cycling (including phosphate coating, carbon coating, metal oxide coating, and conductive polymer coating) to improve structural stability is discussed, as are means of improving their interfacial stability with solid/liquid electrolytes by modifying the electrolyte, in order to boost their cycling performance. Their electrochemical performance can also be improved by binder optimization. The review concludes by considering their future prospects, and provides detailed guidance for the rational design and scalable production of next-generation LRMO cathode materials for highenergy-density lithium-ion batteries.
期刊介绍：
New Carbon Materials is a scholarly journal that publishes original research papers focusing on the physics, chemistry, and technology of organic substances that serve as precursors for creating carbonaceous solids with aromatic or tetrahedral bonding. The scope of materials covered by the journal extends from diamond and graphite to a variety of forms including chars, semicokes, mesophase substances, carbons, carbon fibers, carbynes, fullerenes, and carbon nanotubes. The journal's objective is to showcase the latest research findings and advancements in the areas of formation, structure, properties, behaviors, and technological applications of carbon materials. Additionally, the journal includes papers on the secondary production of new carbon and composite materials, such as carbon-carbon composites, derived from the aforementioned carbons. Research papers on organic substances will be considered for publication only if they have a direct relevance to the resulting carbon materials.
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