检索结果-南通市图书馆

Advanced Nonflammable localized high-concentration electrolyte For high Energy Density Lithium Battery

Energy & Environmental Materials 2022年第4期5卷 1294-1302页

作者： Mengmin Jia Chi Zhang Yawei Guo Linshan Peng Xiaoyan Zhang Weiwei Qian Lan Zhang Suojiang Zhang CAS Key Laboratory of Green Process and Engineering State Key Laboratory of Multiphase Complex SystemsInstitute of Process EngineeringBeijing Key Laboratory of Ionic Liquids Clean ProcessChinese Academy of SciencesBeijing 100190China School of Chemical Engineering University of Chinese Academy of SciencesBeijing 100049China School of Chemical Engineering Zhengzhou UniversityZhengzhou 450001China School of Chemical Engineering and Technology Xi’an Jiaotong UniversityXi’an 710049China Langfang Institute of Process Engineering Chinese Academy of SciencesHebei 065001China

The key to realize long-life high energy density lithium batteries is to exploit functional electrolytes capable of stabilizing both high voltage cathode and lithium anode.The emergence of localized high-concentration electrolytes(LHCEs)shows great promise for ameliorating the above-mentioned interfacial issues.In this work,a lithium difluoro(oxalate)borate(LiDFOB)based nonflammable dual-anion LHCE is designed and prepared.Dissolving in the mixture of trimethyl phosphate(TMP)/1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropylether(D_(2)),the continuously consumption of LiDFOB is suppressed by simply introducing lithium nitrate(LiNO_(3)).Meantime,as most of the TMP molecular are coordinated with Li^(+),the electrolyte does not show incompatibility issue between neither metal lithium nor graphite anode.Therefore,it demonstrates excellent capability in stabilizing the interface of Ni-rich cathode and regulating lithium deposition morphology.The Li||LiNi_(0.87)Co_(0.08)Mn_(0.05)O_(2)(NCM87)batteries exhibit high capacity retention of more than 90%after 200 cycles even under the high cutoff voltage of 4.5 V,1 C rate.This study offers a prospective method to develop safe electrolytes suitable for high voltage applications,thus providing higher energy densities.

关键词： dual-anion lithium metal battery localized high-concentration electrolyte nonflammable phosphate

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Hybrid diluents enable localized high-concentration electrolyte with balanced performance for high-voltage lithium-metal batteries

引用

Chinese Chemical Letters 2023年第7期34卷 327-331页

作者： Chengzong Li Yan Li Ziyu Chen Yongchao Zhou Fengwei Bai Tao Li School of Resource Environment and Safety Engineering University of South ChinaHengyang 421001China

localized high-concentration electrolytes(LHCE) have shown good compatibility with high-voltage lithium(Li)-metal batteries, but their practicality is yet to be proved in terms of cost and safety. Here we develop a hybrid-LHCE with favorable integrated properties by combining the merits of two representative diluents, fluorobenzene(FB) and 1,1,2,2-tetrafluoroethyl-2,2,2-trifluoroethyl ether(TFE). Specifically,the extremely cheap and lightweight FB significantly reduces the cost and density of electrolyte, while the fire-retardant TFE circumvents the flammable nature of FB and thus greatly improves the safety of electrolyte. Moreover, the FB–TFE mixture enhances the thermodynamic stability of hybrid-LHCE and renders a controllable defluorination of FB, contributing to the formation of a thin and durable inorganic-rich solid electrolyte interphase(SEI) with rapid ion-transport kinetics. Benefiting from the designed hybridLHCE, a Li|NCM523 battery demonstrates excellent cycling performance(215 cycles, 91% capacity retention) under challenging conditions of thin Li-anode(30 μm) and high cathode loading(3.5 m Ah/cm^(2)).

关键词： localized high-concentration electrolyte high-voltage lithium-metal batteries Solid electrolyte interphase electrolyte Ion-transport kinetics

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

localized high-concentration electrolytes for lithium metal batteries:progress and prospect

引用

Frontiers of Chemical Science and Engineering 2023年第10期17卷 1354-1371页

作者： Jia-Xin Guo Wen-Bo Tang Xiaosong Xiong He Liu Tao Wang Yuping Wu Xin-Bing Cheng School of Energy and Environment Southeast UniversityNanjing 211189China School of Chemistry and Materials Science Nanjing University of Information Science and TechnologyNanjing 210044China

With the increasing development of digital devices and electric vehicles,high energy-density rechargeable batteries are strongly required.As one of the most promising anode materials with an ultrahigh specific capacity and extremely low electrode potential,lithium metal is greatly considered an ideal candidate for nextgeneration battery systems.Nevertheless,limited Coulombic efficiency and potential safety risks severely hinder the practical applications of lithium metal batteries due to the inevitable growth of lithium dendrites and poor interface stability.Tremendous efforts have been explored to address these challenges,mainly focusing on the design of novel electrolytes.Here,we provide an overview of the recent developments of localized high-concentration electrolytes in lithium metal batteries.Firstly,the solvation structures and physicochemical properties of localized high-concentration electrolytes are analyzed.Then,the developments of localized high-concentration electrolytes to suppress the formation of dendritic lithium,broaden the voltage window of electrolytes,enhance safety,and render low-temperature operation for robust lithium metal batteries are discussed.Lastly,the remaining challenges and further possible research directions for localized highconcentration electrolytes are outlined,which can promisingly render the practical applications of lithium metal batteries.

关键词： high-concentration electrolyte localized high-concentration electrolyte lithium metal battery solid electrolyte interphase dendrite

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Diluent decomposition-assisted formation of Li F-rich solid-electrolyte interfaces enables high-energy Li-metal batteries

引用

Journal of Energy Chemistry 2023年第3期78卷 71-79,I0003页

作者： Junbo Zhang Haikuo Zhang Ruhong Li Ling Lv Di Lu Shuoqing Zhang Xuezhang Xiao Shujiang Geng Fuhui Wang Tao Deng Lixin Chen Xiulin Fan Shenyang National Laboratory for Materials Science Northeastern UniversityShenyang 110819LiaoningChina State Key Laboratory of Silicon Materials School of Materials Science and EngineeringZhejiang UniversityHangzhou 310027ZhejiangChina Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou 310013ZhejiangChina Department of Chemical and Biomolecular Engineering University of MarylandCollege Park 20742MDUSA

Passivation by the inorganic-rich solid electrolyte interphase(SEI),especially the LiF-rich SEI,is highly desirable to guarantee the durable lifespan of Li metal batteries(LMBs).Here,we report a diluent with the capability to facilitate the formation of LiF-rich SEI while avoiding the excess consumption of Li salts.Dissimilar to most of reported inert diluents,heptafluoro-l-methoxypropane(HM) is firstly demonstrated to cooperate with the decomposition of anions to generate LiF-rich SEI via releasing Fcontaining species near Li surface.The designed electrolyte consisting of 1.8 M LiFSI in the mixture of1,2-dimethoxyethane(DME)/HM(2:1 by vol.) achieves excellent compatibility with both Li metal anodes(Coulombic efficiency~99.8%) and high-voltage cathodes(4.4 V LiNi_(0.8)Mn_(0.1)Co_(0.1)O_(2)(NMC811) and 4.5 V LiCoO_(2)(LCO) vs Li^(+)/Li).The 4.4 V Li(20μm)‖NMC811(2.5 mA h cm^(-2)) and 4.5 V Li(20μm)‖LCO(2.5 mA h cm^(-2)) cells achieve capacity retentions of 80% over 560 cycles and 80% over 505 cycles,respectively.Meanwhile,the anode-free pouch cell delivers an energy density of~293 W h kg^(-1)initially and retains 70% of capacity after 100 deep cycles.This work highlights the critical impact of diluent on the SEI formation,and opens up a new direction for designing desirable interfacial chemistries to enable high-performance LMBs.

关键词： Diluent Solvation structure LiF-rich SEI Li metal batteries localized high-concentration electrolyte

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Outstanding performances of graphite||NMC622 pouch cells enabled by a non-inert diluent

引用

能源化学:英文版 2023年第6期81卷 593-602,I0013页

作者： Qinqin Cai Hao Jia Guanjie Li Zhangyating Xie Xintao Zhou Zekai Ma Lidan Xing Weishan Li Engineering Research Center of MTEES(Ministry of Education) Research Center of BMET(Guangdong Province)Engineering Lab.of OFMHEB(Guangdong Province)Key Lab.of ETESPG(GHEI)and Innovative Platform for ITBMD(Guangzhou Municipality)School of ChemistrySouth China Normal UniversityGuangzhou 510006GuangdongChina

Although high salt concentration electrolyte(HCE)can construct effective Li F-rich interphase film and solve the interphasial instability issue of graphite anode,its high cost,high viscosity and poor wettability with electrode materials limit its large-scale application.Generally,localized high concentration electrolyte(LHCE)is obtained by introducing an electrochemically inert diluent into HCE to avoid the above-mentioned problems while maintaining the high interphasial stability of HCE with graphite anode.Unlike traditional inert diluents,1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluropropyl ether(TTE)with electrochemical activity is introduced into propylene carbonate(PC)-based HCE to obtain LHCE-2(1 M LiPF_(6),PC:DMC:TTE=1:1:6.1)herein.Experimental and theoretical simulation results show that TTE participates in the oxidation decomposition and film-forming reaction at the NCM622 cathode surface,conducting a cathode electrolyte interphase(CEI)rich in organic fluorides with excellent electron insulation ability,high structural stability and low interphasial impedance.Thanks to the outstanding interphasial properties induced by LHCE-2,the graphite||NMC622 pouch cell reaches a capacity retention of 80%after 500 cycles at 1 C under room temperature.While at sub-zero temperatures,the capacity released by the cell with LHCE-2 electrolyte is significantly higher than that of HCE and conventional EC-based electrolytes.Meanwhile,the LHCE-2 electrolyte inherits the advantages of TTE flame-resistant,thus improving the safety of the battery.

关键词： Lithium-ion batteries Propylene carbonate localized high-concentration electrolyte Non-Inert diluent Graphite||NMC622 pouch cells

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Lithium deposition behavior in hard carbon hosts:Optical microscopy and scanning electron microscopy study

引用

Nano Research 2023年第6期16卷 8368-8376页

作者： Ge Zhou Yulin Zhao Chuan Hu Zhenzhen Ren Hong Li Liping Wang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Tianmu Lake Institute of Advanced Energy Storage Technologies Changzhou 213300China Key Laboratory for Renewable Energy Institute of PhysicsChinese Academy of SciencesBeijing 100190China

Lithium(Li)metal is an ideal anode for the next generation high-energy-density batteries.However,it suffers from dendrite growth,side reactions,and infinite relative volume change.Effective strategies are using porous carbons or surface modification carbons to guide Li deposition into their pores.While the Li deposition behavior is still ambiguous.Here,we systematically determine their deposition behavior in various surface-modified carbons and in different electrolytes via optical microscopy and scanning electron microscopy study.It is found that Li will not spontaneously deposit into the carbon pores,which is significantly dependent on the carbon surface,current density,areal capacity,and electrolyte.Thus,a“lithiophilic”modified commercial hard carbon with Ag is developed as a stable“host”and efficient surface protection derived from the localized high-concentration electrolyte exhibits a pretty low volume change(5.3%)during cycling at a current density of 2 mA·cm^(−2)and an areal capacity of 2 mAh·cm^(−2).This strategy addresses the volume change and dendrite problems by rationally designed host and electrolyte,providing a broad perspective for realizing Li-metal anode.

关键词： lithium-metal anode lithium deposition behavior hard carbon host lithiophilic sites localized high-concentration electrolyte

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：