检索结果-南通市图书馆

Inhibiting voltage decay in Li-Rich Layered Oxide Cathode: From O3-Type to O2-Type Structural Design

NANO-MICRO LETTERS 2024年第1期16卷 1-22页

作者： Zhang, Guohua Wen, Xiaohui Gao, Yuheng Zhang, Renyuan Huang, Yunhui Tongji Univ Inst New Energy Vehicles Sch Mat Sci & Engn Shanghai Key Lab R&D & Applicat Met Funct Mat Shanghai 201804 Peoples R China Contemporary Amperex Technol Co Ltd Ningde 352100 Peoples R China Huazhong Univ Sci & Technol Sch Mat Sci & Engn State Key Lab Mat Proc & Die & Mould Technol Wuhan 430074 Hubei Peoples R China

This review systematically compares the different effects of O2-type and O3-type structures on voltage decay for Li-rich layered oxide (LRLO) *** development of O2-type materials and the corresponding mechanisms for addressing voltage decay are comprehensively *** perspectives and challenges for designing high-performance O2-type LRLO cathodes without voltage decay are proposed. Li-rich layered oxide (LRLO) cathodes have been regarded as promising candidates for next-generation Li-ion batteries due to their exceptionally high energy density, which combines cationic and anionic redox activities. However, continuous voltage decay during cycling remains the primary obstacle for practical applications, which has yet to be fundamentally addressed. It is widely acknowledged that voltage decay originates from the irreversible migration of transition metal ions, which usually further exacerbates structural evolution and aggravates the irreversible oxygen redox reactions. Recently, constructing O2-type structure has been considered one of the most promising approaches for inhibiting voltage decay. In this review, the relationship between voltage decay and structural evolution is systematically elucidated. Strategies to suppress voltage decay are systematically summarized. Additionally, the design of O2-type structure and the corresponding mechanism of suppressing voltage decay are comprehensively discussed. Unfortunately, the reported O2-type LRLO cathodes still exhibit partially disordered structure with extended cycles. Herein, the factors that may cause the irreversible transition metal migrations in O2-type LRLO materials are also explored, while the perspectives and challenges for designing high-performance O2-type LRLO cathodes without voltage decay are proposed.

关键词： Lithium-ion batteries Li-rich layered oxide voltage decay Migration of transition metal ions O2-type structural design RECHARGEABLE LITHIUM BATTERIES ANIONIC REDOX CHEMISTRY ION-EXCHANGE INTERCALATION COMPOUNDS ELECTRONIC-STRUCTURE O2 STRUCTURE CAPACITY ORIGIN CHALLENGES MECHANISM

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

Mitigation of voltage decay in Li-rich layered oxides as cathode materials for lithium-ion batteries

引用

Nano Research 2020年第1期13卷 151-159页

作者： Wenhui Hu Youxiang Zhang Ling Zan Hengjiang Cong College of Chemistry and Molecular Sciences Wuhan UniversityWuhan430072China Shenzhen Research Institute of Wuhan University Shenzhen518000China

Lithium-rich layered oxides(LLOs)have been extensively studied as cathode materials for lithium-ion batteries(LIBs)by researchers all over the world in the past decades due to their high specific capacities and high charge-discharge ***,as cathode materials LLOs have disadvantages of significant voltage and capacity decays during the charge-discharge *** was shown in the past that fine-tuning of structures and compositions was critical to the performances of this kind of *** this report,LLOs with target composition of Li1.17Mn0.50Ni0.24Co0.09O2 were prepared by carbonate co-precipitation method with different pH values.X-ray powder diffraction(XRD),scanning electron microscopy(SEM),transmission electron microscope(TEM),and electrochemical impedance spectroscopies(EIS)were used to investigate the structures and morphologies of the materials and to understand the improvements of their electrochemical *** the pH values increased from 7.5 to 8.5,the Li/Ni ratios in the compositions decreased from 5.17 to 4.64,and the initial Coulombic efficiency,cycling stability and average discharge voltages were gained ***,the material synthesized at pH=8.5 delivered a reversible discharge capacity of 263 mAhg−1 during the first cycle,with 79.0%initial Coulombic efficiency,at the rate of 0.1 C and a superior capacity retention of 94%after 100 cycles at the rate of 1 ***,this material exhibited an initial average discharge voltage of 3.65 V,with a voltage decay of only 0.09 V after 50 charge-discharge *** improved electrochemical performances by varying the pH values in the synthesis process can be explained by the mitigation of layered-to-spinel phase transformation and the reduction of solid-electrolyte interface(SEI)*** hope this work can shed some light on the alleviation of voltage and capacity decay issues of the LLOs cathode materials.

关键词： lithium ion batteries cathode lithium-rich layered oxides voltage decay Li1.17Mn0.50Ni0.24Co0.09O2

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

Suppress voltage decay of lithium-rich materials by coating layers with different crystalline states

引用

Journal of Energy Chemistry 2021年第9期30卷 591-598页

作者： Zhiwei Zhou Ziyan Luo Zhenjiang He Junchao Zheng Yunjiao Li Cheng Yan Jing Mao School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina National Engineering Laboratory for High Efficiency Recovery of Refractory Nonferrous Metals Central South UniversityChangsha 410083HunanChina Engineering Research Center of the Ministry of Education for Advanced Battery Materials Central South UniversityChangsha 410083HunanChina School of Mechanical Medical and Process EngineeringScience and Engineering FacultyQueensland University of Technology(QUT)BrisbaneQueensland4001Australia School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

Li-rich oxides are considered as the most commercial potential cathode materials due to the high theoretical specific discharge capacity. Here, ZrO_(2) in different crystalline states are applied as the coating layers to enhance the electrochemical performance of hollow Li[Li_(0.2)Mn_(0.54)Ni_(0.13)Co_(0.13)]O_(2) ***, a series of characterizations(XRD, SEM, TEM, EDX etc.) are conducted to compare the effects of ZrO_(2) coating layer with different crystalline states on the host material. The results elucidate that the Li-rich Mn-based material with the polycrystal ZrO_(2) coating layer has a slight advantage in rate performance, while the host material with the single crystal ZrO_(2)-coating layer has a better cycling performance and effectively suppresses voltage decay with the effect of excellently inhibiting layered to spinel-like phase transition and metal dissolution during charging and discharging process.

关键词： Lithium-ion battery Cathode material Surface modification Electrochemical performance voltage decay

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

Suppression of voltage decay through adjusting tap density of lithium-rich layered oxides for lithium ion battery

引用

Journal of Materials Science & Technology 2020年第23期58卷 107-113页

作者： Muhammad Zubair Errui Wang Yinzhong Wang Boya Wang Lin Wang Yuan Liang Haijun Yu College of Materials Science and Engineering Key Laboratory of Advanced Functional MaterialsEducation Ministry of ChinaBeijing University of TechnologyBeijing 100124China

The voltage decay of lithium-rich layered oxides(LLOs)is still one of the key challenges for their application in commercial battery although these materials possess the advantages of high specific capacity and low *** this work,the relationship between voltage decay and tap density of LLOs has been *** voltage decay can be significantly suppressed with the increasing tap density as well as the homogenization of the primary or secondary particle size of agglomerated spherical *** results have shown that an extreme small voltage decay of 0.98 m V cycle^(-1)can be obtained through adjusting the tap density of agglomerated spherical LLOs to 1.99 g cm^(-3),in which the size of primary and secondary particles are *** work offers a new insight towards the voltage decay and capacity fading of LLOs through precursor preparation process,promoting their application in the real battery in the future.

关键词： Lithium-rich layered oxides Tap density Agglomerated spherical particle voltage decay Cycle stability

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

Misfit strains inducing voltage decay in LiMn_(y)Fe_(1-y)PO_(4)/C

引用

Journal of Energy Chemistry 2022年第5期31卷 206-212页

作者： Chun Luo Yao Jiang Xinxin Zhang Chuying Ouyang Xiaobin Niu Liping Wang School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731SichuanChina C Innovation Laboratory Contemporary Amperex Technology Ltd.(21C LAB)Ningde 352100FujianChina

LiMn_(y)Fe_(1-y)PO_(4) is considered a promising cathode material for next-generation lithium-ion batteries(LIBs) due to its high energy density and low cost. Its energy density degradation is often ascribed to the capacity loss during cycling. However, in this study, we find that the energy density degradation mainly roots in voltage decay. We have synthesized a series of LiMn_(y)Fe_(1-y)PO_(4) /C(0.5 ≤ y ≤ 0.8) and find this voltage decay is correlated with the Mn content. A high amount Mn leads to a heavier voltage ***-situ X-ray diffraction(XRD) and high-resolution transmission electron microscopy(HRTEM) reveal the nature of this effect, which show a mismatch along the b-axis of-2.68%(charge) and +3.4%(discharge), a volume misfit of-4.41%(charge) and +4.54%(discharge) between Li_(x)Mn_(y)Fe_(1-y)PO_(4) and Mn_(y)Fe_(1-y)PO_(4) during phase transitions. The resultant misfit strains during Li+insertion compared to extraction result in structural degradations, such as amorphization and impurity(Mn F3) accumulation after cycling. The voltage decay can be alleviated by kinetic relaxations and recovered by a wild reannealing. This work demonstrates effective strategies to improve the energy density and cycling performance of LiMn_(y)Fe_(1-y)PO_(4) /C,providing good references for other LIB cathodes, such as the Li-rich cathodes.

关键词： Olivine cathodes LiMn_(y)Fe_(1-y)PO_(4)/C voltage decay Misfit strains Structural degradation

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

Trace Nb-doped Na_(0.7)Ni_(0.3)Co_(0.1)Mn_(0.6)O_(2) with suppressed voltage decay and enhanced low temperature performance

引用

Chinese Chemical Letters 2021年第2期32卷 849-853页

作者： Ruyun Yue Fang Xia Ruijuan Qi Da Tie Shanshan Shi Zhiping Li Yufeng Zhao Jiujun Zhang Key Laboratory of Applied Chemistry Yanshan UniversityQinhuangdao 066004China Institute for Sustainable Energy 6/College of Sciences Shanghai UniversityShanghai 200444China Key Laboratory of Polar Materials and Devices(MOE) Department of OptoelectronicsEast China Normal UniversityShanghai 200241China

The P2-type manganese-based Na_(0.7)MnO_(2) cathode materials attract great interest due to their high theoretical ***,these materials suffer from rapid capacity fading,poor rate performance and severe voltage decay resulting from phase transition and sluggish reaction *** this work we report a novel Nb-doped Na_(0.7)[Ni_(0.3)Co_(0.1)Mn_(0.6)]_(1-x)Nb_(x)O_(2) with significantly suppre ssed voltage decay and enhanced cycling *** strong Nb-O bond can efficiently stabilize the TMO fra mework,and the as prepared material demonstrates much lower discharge midpoint voltage decay(0.132 V) than that of pristine one(0.319 V) after 200 ***,a remarkably improved cycling perfo rmance with a capacity retention of 87.9% after 200 cycle at 0.5 C is achieved,showing a 2.4 fold improvement as compared to the control sample Na_(0.7)Ni_(0.3)Co_(0.1)Mn_(0.6)O_(2)(~37% rotation).Even at 2 C,a capacity retention of 68.4% is retained after 500 ***,the as prepared material can be applied at low temperature of-20℃,showing a capacity retention of 81% as compared to that at room temperature.

关键词： Manganese-based oxides Sodium ion battery Low temperature voltage decay Cycling stability

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

Understanding voltage hysteresis and decay during anionic redox reaction in layered transition metal oxide cathodes:A critical review

引用

Nano Research 2023年第3期16卷 3766-3780页

作者： Wei Zheng Gemeng Liang Shilin Zhang Kenneth Davey Zaiping Guo School of Chemical Engineering&Advanced Materials The University of AdelaideAdelaideSA 5005Australia

The emergence of anionic redox reactions in layered transition metal oxide cathodes provides practical opportunity to boost the energy density of rechargeable ***,the activation of anionic redox reaction in layered oxides has significant voltage hysteresis and decay that reduce battery performance and limit ***,we critically review the up-todate development of anionic redox reaction in layered oxide cathodes,summarize the proposed reaction mechanism,and unveil their connection to voltage hysteresis and decay based on the state-of-the-art *** addition,advances associated with various modification approaches to mitigate the voltage hysteresis/decay in layered transition metal oxide cathodes are also ***,we conclude with an appraisal of further research directions including rational design of high-performance layered oxide cathodes with reversible anionic redox reactions and suppressed voltage hysteresis/*** will be of immediate benefit to the development of layered oxide cathodes for high performance rechargeable batteries.

关键词： anionic redox reaction voltage hysteresis voltage decay layered transition metal oxides Li-ion battery Na-ion battery

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

Enhanced high-temperature performance of Li-rich layered oxide via surface heterophase coating

引用

Journal of Energy Chemistry 2020年第12期29卷 39-47页

作者： Yuefeng Su Feiyu Yuan Lai Chen Yun Lu Jinyang Dong Youyou Fang Shi Chen Feng Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China

Li-rich layered oxides have become one of the most concerned cathode materials for high-energy lithiumion batteries, but they still suffer from poor cycling stability and detrimental voltage decay, especially at elevated temperature. Herein, we proposed a surface heterophase coating engineering based on amorphous/crystalline Li3 PO4 to address these issues for Li-rich layered oxides via a facile wet chemical method. The heterophase coating layer combines the advantages of physical barrier effect achieved by amorphous Li3 PO4 with facilitated Li+diffusion stemmed from crystalline Li3 PO4. Consequently, the modified Li(1.2) Ni(0.2) Mn(0.6) O2 delivers higher initial coulombic efficiency of 92% with enhanced cycling stability at 55 °C(192.9 mAh/g after 100 cycles at 1 C). More importantly, the intrinsic voltage decay has been inhibited as well, i.e. the average potential drop per cycle decreases from 5.96 mV to 2.99 mV. This surface heterophase coating engineering provides an effective strategy to enhance the high-temperature electrochemical performances of Li-rich layered oxides and guides the direction of surface modification strategies for cathode materials in the future.

关键词： Li-rich layered oxide Surface heterophase coating Crystalline/amorphous Li3PO4 High-temperature performance voltage decay

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

Improving the structural materials via reservation Li-ion batteries stability of Li-rich cathode of cations in the Li-slab for

引用

Nano Research 2017年第12期10卷 4201-4209页

作者： Ji-Lei Shi Dong-Dong Xiao Xu-Dong Zhang Ya-Xia Yin Yu-Guo Guo Lin Gu Li-Jun Wan CAS Key Laboratory of Molecular Nanostructure and Nanotechnology CAS Research~Education Center for Excellence in Molecular Sciences Institute of Chemistry Chinese Academy of Sciences Beijing 100190 China Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences Beijing 100190 China School of Chemistry and Chemical Engineering University of Chinese Academy of Sciences Beijing 100049 China

High-capacity Li-rich cathode materials can significantly improve the energy density of lithium-ion batteries, which is the key limitation to miniaturization of electronic devices and further improvement of electrical-vehicle mileage. However, severe voltage decay hinders the further commercialization of these materials. Insights into the relationship between the inherent structural stability and external appearance of the voltage decay in high-energy Li-rich cathode materials are critical to solve this problem. Here, we demonstrate that structural evolution can be significantly inhibited by the intentional introduction of certain adventive cations （such as Ni2~） or by premeditated reservation of some of the original Li~ ions in the Li slab in the delithiated state. The voltage decay of Li-rich cathode materials over 100 cycles decreased from 500 to 90 or 40 mV upon introducing Ni2~ or retaining some Li~ ions in the Li slab, respectively. The cations in the Li slab can serve as stabilizers to reduce the repulsion between the two neighboring oxygen layers, leading to improved thermodynamic stability. Meanwhile, the cations also suppress transition metal ion migration into the Li slab, thereby inhibiting structural evolution and mitigating voltage decay. These findings provide insights into the origin of voltage decay in Li-rich cathode materials and set new guidelines for designing these materials for high-energy-density Li-ion batteries.

关键词： Li-ion batteries cathode materials lithium-rich voltage decay

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

Urea-assisted mixed gas treatment on Li-Rich layered oxide with enhanced electrochemical performance

引用

Journal of Energy Chemistry 2022年第3期31卷 123-132,I0005页

作者： Liying Bao Lei Wei Nuoting Fu Jinyang Dong Lai Chen Yuefeng Su Ning Li Yun Lu Yongjian Li Shi Chen Feng Wu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing Key Laboratory of Environmental Science and EngineeringBeijing 100081China Beijing Institute of Technology Chongqing Innovation Center Chongqing 401120China School of Automation Beijing Institute of TechnologyBeijing 100081China

Lithium-rich manganese-based oxides(LRMOs)have been considered as one of the most promising cathode materials owing to their superior specific capacity and high operating ***,their largescale commercial applications are limited due to problems such as structural instability,voltage decay,and poor cycle ***,pre-generated oxygen vacancies and oxygen-deficient phase were introduced to Li_(1.2)Mn_(0.6)Ni_(0.2)O_(2)(LMNO)using a facile urea-assisted mixed gas treatment(UMGT)method for facilitating electronic and ionic conductivity,reducing the surface oxygen partial pressure,and suppressing the release of lattice *** with the pristine LMNO material,the UMGT sample modified at 200℃exhibited enhanced discharge capacity,capacity retention,and rate *** addition,the Li+diffusion coefficient significantly improved by 50%than that of the reference *** importantly,the voltage decay was effectively suppressed,with average potential decreasing from 0.53 V(LMNO)to 0.39 V(UMGT-200)after 200 cycles at 1 *** proposed UMGT method provides an effective strategy to alleviate the phase transition and improve the electrochemical performance for lithium-rich materials,and identifies a promising research direction to inhibit the voltage decay of layered anion redox cathode materials.

关键词： Lithium-rich oxides Pre-generated oxygen vacancies Oxygen-deficient voltage decay

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

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

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

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：