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首页> 外文期刊>Advanced energy materials >Ni-Rich/Co-Poor Layered Cathode for Automotive Li-Ion Batteries: Promises and Challenges
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Ni-Rich/Co-Poor Layered Cathode for Automotive Li-Ion Batteries: Promises and Challenges

机译：用于汽车锂离子电池的富镍/贫电分层阴极：承诺和挑战

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摘要

To pursue a higher energy density (>300 Wh kg(-1) at the cell level) and a lower cost (<$125 kWh(-1) expected at 2022) of Li-ion batteries for making electric vehicles (EVs) long range and cost-competitive with internal combustion engine vehicles, developing Ni-rich/Co-poor layered cathode (LiNi1-x-yCoxMnyO2, x+y <= 0.2) is currently one of the most promising strategies because high Ni content is beneficial to high capacity (>200 mAh g(-1)) while low Co content is favorable to minimize battery cost. Unfortunately, Ni-rich cathodes suffer from limited structure stability and electrode/electrolyte interface stability in the charged state, leading to electrode degradation and poor cycling performance. To address these problems, various strategies have been employed such as doping, structural optimization design (e.g., core-shell structure, concentration-gradient structure, etc.), and surface coating. In this review, five key aspects of Ni-rich/Co-poor layered cathode materials are explored: energy density, fast charge capability, service life including cycling life and calendar life, cost and element resources, and safety. This enables a comprehensive analysis of current research advances and challenges from the perspective of both academy and industry to help facilitate practical applications for EVs in the future.
机译：追求更高的能量密度（在电池单元级别上> 300 Wh kg（-1））和更低的成本（到2022年预计低于$ 125 kWh（-1）），以使电动汽车（EV）长距离行驶由于与内燃机汽车具有成本竞争力，开发富镍/贫钴的层状阴极（LiNi1-x-yCoxMnyO2，x + y <= 0.2）目前是最有前途的策略之一，因为高镍含量有利于高镍含量。较低的Co含量（> 200 mAh g（-1）），有利于最大程度地降低电池成本。不幸的是，富镍阴极在充电状态下具有有限的结构稳定性和电极/电解质界面稳定性，从而导致电极退化和较差的循环性能。为了解决这些问题，已经采用了各种策略，例如掺杂，结构优化设计（例如，核-壳结构，浓度梯度结构等）和表面涂层。在这篇综述中，探讨了富镍/贫钴的分层阴极材料的五个关键方面：能量密度，快速充电能力，包括循环寿命和日历寿命的使用寿命，成本和元素资源以及安全性。这可以从学院和行业的角度对当前研究的进展和挑战进行全面分析，以帮助促进未来电动汽车的实际应用。

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  • 来源
    《Advanced energy materials》 |2020年第12期|1903864.1-1903864.28|共28页
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  • 作者单位

    Hunan Univ Coll Mat Sci & Engn Changsha 410082 Peoples R China;

    Hunan Univ Coll Mat Sci & Engn Changsha 410082 Peoples R China|Cent S Univ State Key Lab Powder Met Changsha 410082 Peoples R China;

    Univ Waterloo Dept Chem Engn 200 Univ Ave West Waterloo ON N2L 3G1 Canada;

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  • 正文语种 eng
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  • 关键词

    battery cost; electric vehicles; energy density; lithium ion batteries; Ni-rich; Co-poor cathodes;

    机译：电池成本;电动汽车;能量密度;锂离子电池;富镍阴极贫;

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