CN106340674A - 一种三元过充电池用电解液 - Google Patents

一种三元过充电池用电解液 Download PDF

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CN106340674A
CN106340674A CN201611069484.0A CN201611069484A CN106340674A CN 106340674 A CN106340674 A CN 106340674A CN 201611069484 A CN201611069484 A CN 201611069484A CN 106340674 A CN106340674 A CN 106340674A
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additive
ternary
organic solvent
electrolytic solution
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邵俊华
孔东波
闫国锋
张利娟
李海杰
谢佳庆
郭飞
王鹏飞
杨绍旗
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Henan Faenlaite New Energy Science & Technology Co Ltd
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0569—Liquid materials characterised by the solvents
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0567—Liquid materials characterised by the additives
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/056—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes
    • H01M10/0564—Accumulators with non-aqueous electrolyte characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes the electrolyte being constituted of organic materials only
    • H01M10/0566—Liquid materials
    • H01M10/0568—Liquid materials characterised by the solutes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Secondary Cells (AREA)

Abstract

本发明公开了一种三元过充电池用电解液，包括有机溶剂、锂盐和添加剂，所述有机溶剂为碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯；所述锂盐为双三氟甲基磺酰亚胺锂；所述添加剂为碳酸亚乙烯酯、1,3丙烷磺酸内酯、二氟联苯、环已基苯、联苯和1,3,6‑己烷三腈中的一种或多种。本发明采用合理配比性能稳定的有机溶剂混合液，加入新型锂盐添加剂，增加SEI膜致密均匀但却不增加阻抗，引入过充添加剂，对正极和负极起到成膜保护作用，明显改善了电解液的安全性能。

Description

一种三元过充电池用电解液
技术领域
本发明属于锂离子电池技术领域，特别是涉及一种三元过充电池用电解液。
背景技术
锂离子动力电池能量密度高、高低性能优异、电池的循环性能良好，且绿色无污染等明显优势，成为研究的焦点，并逐渐取代传统铅酸、镍氢、镍镉等电池走向动力电池市场。锂离子电池优点很多，但是锂离子电池在过充时其安全性能不太稳定。因此需要提高三元锂离子电池的过充性能，提高其在安全方面的稳定性。
发明内容
本发明的目的就在于锂离子电池安全性的提高，为三元动力锂电池提供更可靠的保证。
为达到上述目的，本发明是按照以下技术方案实施的：
一种三元过充电池用电解液，包括有机溶剂、锂盐和添加剂，所述有机溶剂为碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯；所述锂盐为双三氟甲基磺酰亚胺锂；所述添加剂为碳酸亚乙烯酯、1,3丙烷磺酸内酯、二氟联苯、环已基苯、联苯和1,3,6-己烷三腈中的一种或多种。
进一步的，所述碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯的体积比为1:0.5: 0.25: 2。
进一步的，所述锂盐的用量为1.1 mol/L。
进一步的，所述添加剂为1,3丙烷磺酸内酯。
进一步的，所述添加剂为碳酸亚乙烯酯和1,3丙烷磺酸内酯。
进一步的，所述添加剂的用量占电解液总质量的2-10%。
与现有技术相比，本发明的有益效果为：
本发明的有机溶剂中加入稳定性较高的碳酸甲丙酯和碳酸二丁酯，提高电解液在低温下的流动性和离子传输能力；添加剂中加入成膜性好的碳酸亚乙烯酯和1,3丙烷磺酸内酯；锂盐采用双三氟甲基磺酰亚胺锂，其在有机溶剂中易溶解，在溶液中的解离度大，离子迁移率高，电导率高，稳定性较高。本发明采用合理配比性能稳定的有机溶剂混合液，加入新型锂盐添加剂，增加SEI膜致密均匀但却不增加阻抗，引入过充添加剂，对正极和负极起到成膜保护作用，明显改善了电解液的安全性能。
具体实施方式
下面结合具体实施例对本发明作进一步描述，在此发明的示意性实施例以及说明用来解释本发明，但并不作为对本发明的限定。
实施例1
一种三元过充电池用电解液，包括有机溶剂、锂盐和添加剂，所述有机溶剂为碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯；碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯的体积比为1: 0.5: 0.25: 2。所述锂盐为双三氟甲基磺酰亚胺锂，用量为1.1 mol/L；所述添加剂为碳酸亚乙烯酯和1,3丙烷磺酸内酯，用量占电解液总质量的3.5%。
实施例2
一种三元过充电池用电解液，包括有机溶剂、锂盐和添加剂，所述有机溶剂为碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯；碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯的体积比为1: 0.5: 0.25: 2。所述锂盐为双三氟甲基磺酰亚胺锂，用量为1.1 mol/L；所述添加剂为1,3丙烷磺酸内酯，用量占电解液总质量的7.5%。
实施例3
一种三元过充电池用电解液，包括有机溶剂、锂盐和添加剂，所述有机溶剂为碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯；碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯的体积比为1: 0.5: 0.25: 2。所述锂盐为双三氟甲基磺酰亚胺锂，用量为1.1 mol/L；所述添加剂为碳酸亚乙烯酯、1,3丙烷磺酸内酯和1,3,6-己烷三腈，用量占电解液总质量的5%。
实施例4
一种三元过充电池用电解液，包括有机溶剂、锂盐和添加剂，所述有机溶剂为碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯；碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯的体积比为1: 0.5: 0.25: 2。所述锂盐为双三氟甲基磺酰亚胺锂，用量为1.1 mol/L；所述添加剂为碳酸亚乙烯酯、1,3丙烷磺酸内酯、二氟联苯和1,3,6-己烷三腈，用量占电解液总质量的5%。
本发明的技术方案不限于上述具体实施例的限制，凡是根据本发明的技术方案做出的技术变形，均落入本发明的保护范围之内。

Claims (6)

1.一种三元过充电池用电解液，包括有机溶剂、锂盐和添加剂，其特征在于，所述有机溶剂为碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯；所述锂盐为双三氟甲基磺酰亚胺锂；所述添加剂为碳酸亚乙烯酯、1,3丙烷磺酸内酯、二氟联苯、环已基苯、联苯和1,3,6-己烷三腈中的一种或多种。
2.根据权利要求1所述的三元过充电池用电解液，其特征在于，所述碳酸乙烯酯、碳酸甲丙酯、碳酸二丁酯和碳酸甲乙酯的体积比为1: 0.5: 0.25: 2。
3.根据权利要求1所述的三元过充电池用电解液，其特征在于，所述锂盐的用量为1.1mol/L。
4.根据权利要求1所述的三元过充电池用电解液，其特征在于，所述添加剂为1,3丙烷磺酸内酯。
5.根据权利要求1所述的三元过充电池用电解液，其特征在于，所述添加剂为碳酸亚乙烯酯和1,3丙烷磺酸内酯。
6.根据权利要求1所述的三元过充电池用电解液，其特征在于，所述添加剂的用量占电解液总质量的2-10%。
CN201611069484.0A 2016-11-29 2016-11-29 一种三元过充电池用电解液 Pending CN106340674A (zh)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022204980A1 (zh) * 2021-03-30 2022-10-06 宁德新能源科技有限公司 一种电解液及含有该电解液的电化学装置
WO2024021962A1 (zh) * 2022-07-28 2024-02-01 张家港市国泰华荣化工新材料有限公司 一种非水电解液及锂离子电池

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KR20150083365A (ko) * 2014-01-09 2015-07-17 주식회사 엘지화학 비수 전해액 및 이를 갖는 리튬 이차전지

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20050106470A1 (en) * 2003-01-22 2005-05-19 Yoon Sang Y. Battery having electrolyte including one or more additives
JP2007172969A (ja) * 2005-12-21 2007-07-05 Sony Corp 電池
CN102544582A (zh) * 2010-12-29 2012-07-04 东莞市杉杉电池材料有限公司 一种动力锂离子电池的电解液
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022204980A1 (zh) * 2021-03-30 2022-10-06 宁德新能源科技有限公司 一种电解液及含有该电解液的电化学装置
WO2024021962A1 (zh) * 2022-07-28 2024-02-01 张家港市国泰华荣化工新材料有限公司 一种非水电解液及锂离子电池

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Application publication date: 20170118