首页|电解液改善锂离子电池低温析锂研究进展

电解液改善锂离子电池低温析锂研究进展

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  • 国家科技期刊平台
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锂离子电池作为便携式电子产品和电动汽车的"心脏",在推动人类社会的无化石燃料化中发挥着至关重要的作用.然而,在低温条件下(0℃及以下)充电时,锂离子电池电极极化急剧增大,导致了严重的析锂问题.通过合理设计低温电解液,降低低温充电时电极极化,并构建稳定的电解液-电极界面,可以有效遏制析锂及其对锂离子电池带来的不利影响.本文首先阐释了低温下锂离子电池析锂的形成机制,并指出低温电解液的设计是改善锂离子电池低温析锂行为的有效途径.接着,本文进一步介绍了缓解低温析锂问题的几种电解液设计策略,包括降低去溶剂化能垒的弱溶剂化电解液和共嵌入电解液、衍生低阻抗固态电解质界面膜(SEI)的局部高盐电解液以及钝化析锂的羧酸酯基高盐电解液,同时比较了这些策略的优劣势.最后,结合现有研究成果,展望了电解液调控低温析锂行为的未来研究方向,提出了发展实时析锂预警方法、采用实用化条件评估电解液抑制低温析锂能力以及设计兼顾电化学动力学和界面稳定性的高比能硅碳负极用低温电解液,以望实现低温锂离子电池的高容量发挥和长循环寿命.
A review of electrolyte reducing lithium plating in low-temperature lithium-ion batteries
Lithium-ion batteries(LIBs)are strongly considered the"heart"of portable electronic devices and electric vehicles,playing a vital role in advancing the de-fossil fuels for our sustainable world.However,during charging in low-temperature conditions(0℃ and below),the electrode polarization of LIBs increases,leading to significant Li plating.To address this issue,it is imperative to strategically design low-temperature electrolytes,that can reduce electrode polarization during low-temperature charging and establish a stable electrolyte-electrode interface.By doing so,it becomes feasible to effectively mitigate Li plating and its detrimental impacts on LIBs.In this review,we firstly introduce the formation mechanism of low-temperature lithium plating and emphasize that the implementation of low-temperature electrolyte to mitigating the low-temperature Li plating in working LIBs.Subsequently,we summarize various electrolyte design strategies aimed at mitigating the challenges posed by low-temperature Li plating.The strategies include weakly solvating electrolytes and solvent co-intercalation electrolytes to lower the desolvation energy barrier,localized high-concentration electrolytes for low-impedance SEI formation,and ester-based high-concentration electrolytes for passivating plated Li.Furthermore,we analyzed the strengths and weaknesses of these strategies.Lastly,drawing on existing research findings,we outline the future directions concerning the regulation of low-temperature Li plating behavior through electrolyte solutions.Emphasis is placed on the necessity of developing real-time early-warning methods for Li plating,evaluating the effectiveness of electrolytes in inhibiting low-temperature Li plating under practical conditions,and designing of low-temperature electrolytes tailored for silicon-carbon composite anodes that consider both electrochemical kinetics and interfacial stability.These approaches aim to simultaneously achieve high capacity and long lifespan of low-temperature LIBs.

Li platinglow temperatureelectrolytelithium-ion batterieselectrode polarization

李泽珩、徐磊、姚雨星、闫崇、翟喜民、郝雪纯、陈爱兵、黄佳琦、别晓非、孙焕丽、范丽珍、张强

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清华大学化学工程系,绿电化工研究中心,绿色反应工程与工艺北京市重点实验室,北京 100084

浙江大学化学工程与生物工程学院,浙江 杭州 310058

北京理工大学前沿交叉科学研究院,北京 100081

中国第一汽车股份有限公司,吉林 长春 130013

河北科技大学化学与制药工程学院,河北 石家庄 050018

北京科技大学新材料技术研究院,北京 100083

清华大学碳中和研究院,北京 100084

清华大学山西清洁能源研究院,山西 太原 030032

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析锂 低温 电解液 锂离子电池 电极极化

京津冀协同创新共同体建设专项北京市自然科学基金重点项目国家自然科学基金项目国家自然科学基金项目国家自然科学基金项目吉林省重大专项山西省重点研发计划鄂尔多斯-清华碳中和协同创新专项清华大学自主科研

22344402DZ2000112237901452100342U21A208020210301021GX202102060301011

2024

10.19799/j.cnki.2095-4239.2024.0559

储能科学与技术
化学工业出版社

储能科学与技术

CSTPCD北大核心
影响因子：0.852
ISSN：2095-4239
年,卷(期)：2024.13(7)