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Ultra-Low-Dose Pre-Metallation Strategy Served for Commercial Metal-Ion Capacitors

Nano-Micro Letters 2022年第3期14卷 276-291页

作者： Zirui Song Guiyu Zhang Xinglan Deng kangyu zou Xuhuan Xiao Roya Momen Abouzar Massoudi Wentao Deng Jiugang Hu Hongshuai Hou Guoqiang zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China Department of Semiconductors Materials and Energy Research Center P.O.Box 14155/4777TehranIran College of Material Science and Engineering Zhengzhou UniversityZhengzhou 450001People’s Republic of China

Sacrificial pre-metallation strategy could compensate for the irreversible consumption of metal ions and reduce the potential of anode,thereby elevating the cycle performance as well as open-circuit voltage for full metal ion capacitors(MICs).However,suffered from massive-dosage abuse,exorbitant decomposition potential,and side effects of decomposition residue,the wide application of sacrificial approach was restricted.Herein,assisted with density functional theory calculations,strongly coupled interface(M-O-C,M=Li/Na/K)and electron donating group have been put forward to regulate the band gap and highest occupied molecular orbital level of metal oxalate(M_(2)C_(2)O_(4)),reducing polarization phenomenon and Gibbs free energy required for decomposition,which eventually decrease the practical decomposition potential from 4.50 to 3.95 V.Remarkably,full sodium ion capacitors constituted of commercial materials(activated carbon//hard carbon)could deliver a prominent energy density of 118.2 Wh kg^(−1)as well as excellent cycle stability under an ultra-low dosage pre-sodiation reagent of 15-30 wt%(far less than currently 100 wt%).Noteworthily,decomposition mechanism of sacrificial compound and the relative influence on the system of MICs after pre-metallation were initially revealed by in situ differential electrochemical mass spectrometry,offering in-depth insights for comprehending the function of cathode additives.In addition,this breakthrough has been successfully utilized in high performance lithium/potassium ion capacitors with Li_(2)C_(2)O_(4)/K_(2)C_(2)O_(4) as pre-metallation reagent,which will convincingly promote the commercialization of MICs.

关键词： Coupled interface Pre-metallation Metal oxalate Decomposition potential

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Methods of improving the initial Coulombic efficiency and rate performance of both anode and cathode materials for sodium-ion batteries

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Chinese Chemical Letters 2022年第2期33卷 730-742页

作者： Nkongolo Tshamala Aristote kangyu zou Andi Di Wentao Deng Baowei Wang Xinglan Deng Hongshuai Hou Guoqiang zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China Department of Materials and Environmental Chemistry Stockholm UniversityStockholm 10691Sweden

Sodium-ion batteries(SIBs) have gained more scientists’ interest, owing to some facts such as the natural abundance of Na, the similarities of physicochemical characteristics between Li and Na. The irreversible Na+ions consumption during the first cycle of charge/discharge process(due to the formation of the solid electrolyte interface(SEI) on the electrode surface and other irreversible reactions) is the factor that determines high performance SIBs and largely reduces the capacity of the full cell SIBs. Thus, the initial coulombic efficiency(ICE) of SIBs for both anode and cathode materials, is a key parameter for high performance SIBs, and the point is to increase the transport rate of the Na+ions. Therefore, developing SIBs with high ICE and rate performance becomes vital to boost the commercialization of SIBs. Here we provide a review on the methods to improve the ICE and the rate performance, by summarizing some methods of improving the ICE and rate performance of the anode and cathode materials for SIBs, and end by a conclusion with some perspectives and recommendations.

关键词： Initial coulombic efficiency Rate performance Sodium-ion batteries Anode materials Cathode materials

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K_(x)C_(y) phase induced expanded interlayer in ultra-thin carbon toward full potassium-ion capacitors

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Carbon Energy 2022年第6期4卷 1151-1168页

作者： Xinglan Deng Ye Tian kangyu zou Jun Chen Xuhuan Xiao Shusheng Tao Zirui Song Wentao Deng Hongshuai Hou Guoqiang zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangshaHunanChina College of Materials Science and Engineering Zhengzhou UniversityZhengzhouChina

Carbonaceous materials have been regarded as highly promising anode candidates for potassium storage with their cost-effectiveness and environmental benignity.However,low specific capacity and difficulty in large-scale synthesis largely hinder their further development.Herein,a thermal-induced potassium–carbon alloy phase(K_(x)C_(y))with the expanded interlayer spacing strategy is first put forward.Through in situ high-temperature X-ray diffraction,a K_(2)C_(2) phase is evoked by thermal energy during the in-situ carbonization process of carbon quantum dots intermediate derived from potassium-containing precursors,whereas no lithium or sodium–carbon alloy phase is observed from lithium/sodium-containing precursors.The asobtained ultra-thin carbon nanosheets achieve adjustable layer spacing,preparation in bulk,delivering reversible potassium storage of 403.4 mAh g^(−1) at 100 mA g^(−1) and 161.2 mAh g^(−1) even at 5.0 A g^(−1),which is one of the most impressive K-storage performances reported so far with great potential application.Furthermore,the assembled potassium-ion hybrid capacitor by combining the impressive CFMs-900 anode with the three-dimensional framework-activated carbon delivers a high energy-power density of 251.7 Wh kg^(−1) at 250Wkg^(−1) with long-term stability.This study opens a scalable avenue to realize the expanded interlayer spacing,which can be extended to other multicarboxyl potassium salts and can provide approach for the design of high-performance carbon anode materials for potassium storage.

关键词： expanded interlayer K_(x)C_(y)phase potassium-ion capacitors themal-induced ultra-thin carbon

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Insights into Enhanced Capacitive Behavior of Carbon Cathode for Lithium Ion Capacitors: The Coupling of Pore Size and Graphitization Engineering

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Nano-Micro Letters 2020年第9期12卷 239-257页

作者： kangyu zou Peng Cai Baowei Wang Cheng Liu Jiayang Li Tianyun Qiu Guoqiang zou Hongshuai Hou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083People’s Republic of China College of Metallurgy and Chemical Engineering Jiangxi University of Science and Technology86 Hongqi RoadGanzhou 341000People’s Republic of China

The lack of methods to modulate intrinsic textures of carbon cathode has seriously hindered the revelation of in-depth relationship between inherent natures and capacitive behaviors,limiting the advancement of lithium ion capacitors(LICs).Here,an orientateddesigned pore size distribution(range from 0.5 to 200 nm)and graphitization engineering strategy of carbon materials through regulating molar ratios of Zn/Co ions has been proposed,which provides an effective platform to deeply evaluate the capacitive behaviors of carbon cathode.Significantly,after the systematical analysis cooperating with experimental result and density functional theory calculation,it is uncovered that the size of solvated PF6-ion is about 1.5 nm.Moreover,the capacitive behaviors of carbon cathode could be enhanced attributed to the controlled pore size of 1.5-3 nm.Triggered with synergistic effect of graphitization and appropriate pore size distribution,optimized carbon cathode(Zn90Co10-APC)displays excellent capacitive performances with a reversible specific capacity of^50 mAh g-1at a current density of 5 A g-1.Furthermore,the assembly pre-lithiated graphite(PLG)//Zn90Co10-APC LIC could deliver a large energy density of 108 Wh kg-1 and a high power density of 150,000 W kg-1 as well as excellent long-term ability with 10,000 cycles.This elaborate work might shed light on the intensive understanding of the improved capacitive behavior in LiPF6 electrolyte and provide a feasible principle for elaborate fabrication of carbon cathodes for LIC systems.

关键词： Carbon materials Pore size regulation Graphitization Capacitive behavior Lithium ion capacitor

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Revealing dual capacitive mechanism of carbon cathode toward ultrafast quasi-solid-state lithium ion capacitors

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Journal of Energy Chemistry 2021年第9期30卷 209-221页

作者： kangyu zou Peng Cai Xinglan Deng Baowei Wang Cheng Liu Jiayang Li Hongshuai Hou Guoqiang zou Xiaobo Ji College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China College of Metallurgy and Chemical Engineering Jiangxi University of Science and TechnologyGanzhou 341000China

High-performance lithium ion capacitors(LICs) have been seriously hindered by the very low capacity and unclear capacitive mechanism of carbon cathode.Herein,after the combination of experimental results and theoretical calculations,it is found that the critical pore size of 0.8 nm for PF_6~-ion adsorption decreases strong interactive repulsion of electrons and largely reduces adsorption energy barrier,which greatly improves the charge accommodation capacity in electrical double-layer behavior.Most importantly,the chemical-bond evolution process of C=O group has been firstly revealed by X-ray photoelectron spectroscopy(XPS),indicating that the introduction of C=O group can provide abundant redox active sites for PF_6~-ion adsorption accompanied with enhanced pseudocapacitive capacity.Attributed to the synergistic effect of dual capacitive mechanism,porous carbon sheet(PCS) cathode shows a reversible specific capacity of 53.6 mAh g^(-1) even at a high current density of 50 A g^(-1).Significantly,the quasisolid-state LIC manifests state-of-the-art electrochemical performances with an integrated maximum energy density of 163 Wh kg^(-1) and an outstanding power density of 15,000 W kg^(-1).This elaborate work promotes better fundamental understanding about capacitive mechanism of PF_6~-ion and offers a rational dual-capacitive strategy for the design of advanced carbon cathodes.

关键词： Capacitive mechanism Carbon cathode Carbonyl group Quasi-solid-state Lithium ion capacitors

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煅烧温度对钠离子电池P2-Na_(0.67)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2)正极材料性能的影响

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中国有色金属学报 2024年第6期34卷 1884-1892页

作者：吴奇峰谭磊任延杰邹康宇宁天翔李灵均长沙理工大学能源与动力工程学院长沙410114 长沙理工大学材料科学与工程学院长沙410114

层状氧化物材料因其容量高被认为是钠离子电池(SIBs)的候选正极材料,其中,锰基P2型层状氧化物因成本低、稳定性好,是具有发展前景的钠离子电池层状正极材料。本文采用固相烧结法制备一种P2-Na_(0.67)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2)正极... 详细信息

层状氧化物材料因其容量高被认为是钠离子电池(SIBs)的候选正极材料,其中,锰基P2型层状氧化物因成本低、稳定性好,是具有发展前景的钠离子电池层状正极材料。本文采用固相烧结法制备一种P2-Na_(0.67)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2)正极材料,研究煅烧温度对正极材料性能的影响。结果表明:在875℃下获得的Na_(0.67)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2)正极材料具有结晶良好的P2纯相,表现出优异的电化学性能。在1.5~4.3 V的电压范围内,0.05C下所制备正极材料的初始放电容量为232 mA·h/g,且循环100次后,正极材料的容量保持率为69.5%。

关键词：钠离子电池 Ni/Fe/Mn基正极材料煅烧温度电化学性能

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高镍正极材料表面锂残渣的研究进展

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储能科学与技术 2024年第1期13卷 92-112页

作者：王盼晴黄彦杰何一芃陈祁恒尹提陈伟豪谭磊宁天翔邹康宇李灵均长沙理工大学材料科学与工程学院 2长沙理工大学能源动力与工程学院湖南长沙410000

目前锂离子电池的电化学性能和成本在很大程度上取决于正极材料,其中,具有高比容量和高工作电压等优点的高镍层状正极材料被广泛关注。然而,其表面的锂残渣会严重影响电极的制备和电池的电化学性能,限制了其在新能源汽车等领域的大规模... 详细信息

目前锂离子电池的电化学性能和成本在很大程度上取决于正极材料,其中,具有高比容量和高工作电压等优点的高镍层状正极材料被广泛关注。然而,其表面的锂残渣会严重影响电极的制备和电池的电化学性能,限制了其在新能源汽车等领域的大规模应用。因此,高镍层状正极材料表面锂残渣的研究在进一步提升材料性能和电池安全性能等方面具有重要意义。本文综述了近年来高镍层状正极材料表面锂残渣的研究进展,从锂残渣形成机理,对高镍层状正极材料的影响以及酸碱滴定、傅里叶红外光谱、飞行时间二次离子质谱、固态核磁共振及热重分析结合质谱等锂残渣含量检测方法方面展开,总结了利用去除、物理包覆及原位再利用三种方法有效消除锂残渣对高镍层状正极材料的影响,改善其性能,并对进一步消除锂残渣对正极材料及锂离子电池的影响进行了展望。同时,本文针对锂残渣的展望及研究也同样适用于钠离子电池正极材料表面的钠残渣。本文旨在突出锂残渣原位再利用在高镍层状正极材料改性研究中的应用潜力,为锂离子电池的研究发展提供新的思路。

关键词：高镍层状正极材料锂残渣形成机理检测方法原位再利用

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缺陷辅助高阴离子S/Se/P掺杂助力高性能钠离子电容器的快速传荷动力学

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Science Bulletin 2021年第18期66卷 1858-1868,M0003页

作者：邓杏兰邹康宇 Roya Momen 蔡鹏陈军侯红帅邹国强纪效波 College of Chemistry and Chemical Engineering Central South UniversityChangsha 410083China State Key Laboratory of Powder Metallurgy College of Chemistry and Chemical EngineeringCentral South UniversityChangsha 410083China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450002China

设计具有快速传荷动力学的二氧化钛负极材料是进一步构建高能量功率密度混合离子电容器的关键所在.本文提出一个氧空位辅助二氧化钛高阴离子掺杂的策略,合成了高含量硫/硒/磷掺杂的二氧化钛负极材料.通过实验结果与理论计算相结合,本文... 详细信息

设计具有快速传荷动力学的二氧化钛负极材料是进一步构建高能量功率密度混合离子电容器的关键所在.本文提出一个氧空位辅助二氧化钛高阴离子掺杂的策略,合成了高含量硫/硒/磷掺杂的二氧化钛负极材料.通过实验结果与理论计算相结合,本文系统地研究了氧空位辅助掺杂的可行性、硫掺杂对二氧化钛的影响以及二氧化钛负极材料倍率性能极大提升的深层次机理.研究发现,氧空位的引入可以使硫掺杂过程自发进行,高含量的硫掺杂在二氧化钛能带结构中引入S 2p,使得其能带间隙变小,导电率显著提升;同时,硫进入晶格后,离子的迁移能垒降低,离子迁移速率增加,传荷动力学提高.这项工作为实现阴离子的高含量掺杂和提升二氧化钛的电荷转移动力学提供了一种新的策略,为设计具有快速动力学的电极材料提供了行之有效的方法.

关键词： Vacancy engineering Anion doping Charge transfer kinetics Sodium ion capacitors Titanium dioxide

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仓储搬运机器人在汽车工厂一次物流领域的应用

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物流技术 2019年第3期38卷 96-101,142页

作者：葛世恭邹康宇风神物流有限公司物流技术部广东广州510800

基于仓储搬运机器人的设备特点,吸取仓储搬运机器人在电商物流领域的应用经验,并结合汽车工厂一次物流的作业特点,对仓储搬运机器人在集配拣选作业和供给作业的应用模式和信息传递方式进行了分析。并利用Flexsim软件模拟了仓储搬运机器... 详细信息

基于仓储搬运机器人的设备特点,吸取仓储搬运机器人在电商物流领域的应用经验,并结合汽车工厂一次物流的作业特点,对仓储搬运机器人在集配拣选作业和供给作业的应用模式和信息传递方式进行了分析。并利用Flexsim软件模拟了仓储搬运机器人在某汽车工厂供给作业的应用场景,结果表明:针对不同零部件设置不同的预置换台份可减少仓储搬运机器人供给不及时的情况。

关键词：仓储搬运机器人汽车工厂一次物流

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钠离子电池层状氧化物正极:层间滑移,相变与性能

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储能科学与技术 2020年第5期9卷 1327-1339页

作者：刘欢庆高旭陈军尹首懿邹康宇徐来强邹国强侯红帅纪效波中南大学化学化工学院湖南长沙410083

由于钠资源丰富,钠离子电池(SIB)作为二次离子电池已经受到越来越多地关注,特别是对于大规模储能而言。但是,由于缺乏合适的宿主材料可逆地脱/嵌Na离子,其发展受到了极大限制。层状过渡金属氧化物(NaxMO2,M=Fe、Mn、Ni、Co、Cr及其组合... 详细信息

由于钠资源丰富,钠离子电池(SIB)作为二次离子电池已经受到越来越多地关注,特别是对于大规模储能而言。但是,由于缺乏合适的宿主材料可逆地脱/嵌Na离子,其发展受到了极大限制。层状过渡金属氧化物(NaxMO2,M=Fe、Mn、Ni、Co、Cr及其组合)是一类重要的SIB正极材料。由于其理论容量高、结构简单等优势,因而具有良好的发展前景。与锂的层状过渡金属氧化物不同,钠层状过渡金属氧化物易发生层间滑移以及相变。本文总结了NaxMO2正极材料的结构演变、电化学性能的最新进展。旨在阐明结构演变与电池性能(循环性能、倍率性能和能量效率)的关联。此外,本文还提出了几种策略来缓解这种问题。

关键词：正极材料相变层间滑移钠离子电池层状氧化物

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