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Novel hierarchical yolk-shell α-Ni(OH)_(2)/Mn_(2)O_(3) microspheres as high specific capacitance electrode materials for supercapacitors

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Frontiers of Chemical Science and Engineering 2021年第5期15卷 1322-1331页

作者： Xiqing Luo Miaomiao Jiang Kun Shi Zhangxian Chen Zeheng Yang Weixin Zhang School of Chemistry and Chemical Engineering Hefei University of Technology and Anhui Key Laboratory of Controllable Chemical Reaction&Material Chemical EngineeringHefei230009China

For high performance supercapacitors, novel hierarchical yolk-shell α-Ni(OH)_(2)/Mn_(2)O_(3) microspheres were controllably synthesized using a facile two-step method based on the solvothermal treatment. The unique α-Ni(OH)_(2) based yolk-shell microstructures decorated with numerous interconnected nanosheets and the heterocomposition features can synergistically enhance reactive site exposure and electron conduction within the microspheres, facilitate charge transfer between electrolyte and electrode materials, and release structural stress during OH− chemisorption/desorption. Moreover, the Mn2O3 sediments distributed over the α-Ni(OH)_(2) microspheres can serve as an effective protective layer for electrochemical reactions. Consequently, when tested in 1 mol·L^(−1) KOH aqueous electrolyte for supercapacitors, the yolk-shell α-Ni (OH)_(2)/Mn_(2)O_(3) microspheres exhibited a considerably high specific capacitance of 2228.6 F·g^(−1) at 1 A·g^(−1) and an impressive capacitance retention of 77.7% after 3000 cycles at 10 A·g^(−1). The proposed α-Ni(OH)_(2)/Mn_(2)O_(3) microspheres with hetero-composition and unique hierarchical yolk-shell microstructures are highly promising to be used as electrode materials in supercapacitors and other energy storage devices.

关键词： α-Ni(OH)_(2)/Mn_(2)O_(3) yolk-shell microspheres electrode material high specific capacitance supercapacitors

Facile synthesis of polypyrrole nanowires for high-performance supercapacitor electrode materials

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Progress in Natural Science:materials International 2016年第3期26卷 237-242页

作者： Junhong Zhao Jinping Wu Bing Li Weimin Du Qingli Huang Mingbo Zheng Huaiguo Xue Huan Pang College of Chemistry and Chemical Engineering Anyang Normal University College of Chemistry and Chemical Engineering Yangzhou University

Polypyrrole nanowires are facile synthesized under a mild condition with FeClas an oxidant. Polypyrrole nanowires with the width of 120 nm form many nanogaps or pores due to the intertwined nanostructures. More importantly, PPy nanowires were further applied for supercapacitor electrode *** electrochemical testing, it was observed that the PPy nanowire based electrode showed a large specific capacitance(420 Fg, 1.5 Ag) and good rate capability(272 Fg, 18.0 Ag), which is larger than that of most of published results. The as-prepared electrode can work well even after 8000 cycles at 1.5 Ag.

关键词： Polypyrrole Nanowire Supercapacitor electrode material

Application of covalent organic frameworks as electrode materials for supercapacitors

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ChemPhysMater 2024年第4期3卷 388-414页

作者： Yanmin Wan Baoshou Shen Xiaoli Zhu Zhongming Guo Institute of Earth Surface System and Hazards College of Urban and Environmental SciencesNorthwest UniversityXi’an 710127China Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity Xi’an 710127China

Supercapacitors have garnered significant attention due to their superior power density,excellent cycle stability,and fast charge/discharge *** properties of the electrode materials determine the charge storage performance of *** organic frameworks(COFs)are a novel class of crystalline porous polymer materials with uniform nanoscale pores,large specific surface areas,and tunable redox-active groups within the framework,which can be tuned to suit specific *** have flexible molecular designs and synthetic strategies,demonstrating their strong application potential in the field of energy *** COFs exhibit poor inherent conductivity and low utilization of active sites,resulting in incomplete electrochemical *** systems can be developed by incorporating redox-active groups,hydrogen bonding,or combining COFs with other materials to improve the energy storage performance of COFs *** this review article,the background of COFs is summarized,including a brief introduction,design strategy,and synthesis *** also discusses their applications in supercapacitors and is categorized into:pristine COFs,modified COFs,and COF matrix ***,the review addresses the challenges that remain for the practical application of these materials in supercapacitors.

关键词： COFs material Supercapacitor electrode material Modification

A dual redox-active and robust polymer enables ultrafast and durable proton-storage capability

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Journal of Energy Chemistry 2024年第11期98卷 237-243页

作者： Jiachen Yang Jing Jin Peipei Zhang Xinyue Zhang Jun Yang Junwei Lang Minjie Shi School of materials Science and Engineering Jiangsu University of Science and TechnologyZhenjiang 212003JiangsuChina Research Center of Resource Chemistry and Energy materials Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000GansuChina Jiangsu New Yangzi Shipbuilding Co.Ltd Jingjiang 214532JiangsuChina

Aqueous proton batteries(APBs) offer a viable and attractive option in the field of affordable and sustainable energy *** polymers are highly favored due to their environmentally friendly manufacturability and malleable molecular configurations,making them suitable materials for constructing APB ***,their currently limited capacity for proton-associated redox reactions poses a challenge to the widespread ***,we have developed a highly redox-active organic polymer(PTA) tailored for APB *** inclusion of dual redox-active moieties in the extended nconjugated frameworks not only enhances the redox activity and refines the electronic properties,but also ensures the high structural integrity of the PTA *** used as an electrode,the PTA polymer has a notable ability to store protons,with a large capacity of 213.99 mA h g^(-1) at 1 A g^(-1) and exceptional long-term stability,as evidenced by retaining 94.6% of its initial capacity after 20,000 *** situ techniques alongside theoretical calculations have unveiled efficient redox processes occurring at C=N and C=O redox-active sites within the PTA electrode upon proton uptake/***,a softpackage APB device has been assembled with impressive electrochemical behaviors and excellent operational lifespan,accentuating its significant promise for real-world deployment.

关键词： Aqueous battery electrode material Organic polymer Electrochemical mechanism Proton storage

Template-free synthesis of hollow carbon-based nanostructures from MOFs for rechargeable battery applications

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Science China Chemistry 2023年第1期66卷 65-77页

作者： De-Shan Bin Ze-Lin Zheng An-Min Cao Li-Jun Wan College of Chemistry and materials Science Guangdong Provincial Key Laboratory of Functional Supramolecular CoordinationMaterials and ApplicationsJinan UniversityGuangzhou 510632China CAS Key Laboratory of Molecular Nanostructure and Nanotechnology Beijing National Laboratory for Molecular SciencesInstitute of ChemistryChinese Academy of Sciences(CAS)Beijing 100190China University of Chinese Academy of Sciences Beijing 100049China

Hollow carbon-based nanostructures(HCNs)have found broad applications in various fields,particularly rechargeable ***,the syntheses of HCNs usually rely on template methods,which are time-consuming,low-yield,and environmentally ***-organic frameworks(MOFs),constructed by organic ligands and inorganic metal nodes,have been identified as effective platforms for preparing HCNs without adding extra *** review summarized the recent progress in template-free synthesis of HCNs enabled by MOFs and their applications in rechargeable *** template-free strategies were introduced first with mechanistic insights into the hollowing *** the electrochemical performances of the HCNs were discussed with highlight on the structure-function *** is found that the built-in cavities and nonporous for HCNs is of critical importance to increase the storage sites for high capacity,to enhance charge and mass transport kinetics for high-rate capability,and to ensure the resilient electrode structure for stable ***,the challenges and opportunities regarding MOFs-derived HCNs and their applications in rechargeable batteries were discussed.

关键词： hollow carbon-based nanostructures template-free synthesis metal-organic frameworks rechargeable battery electrode material

Exploring the potential of constructing a hybrid supercapacitor with FeCoNi-LDH porous material containing oxygen vacancies for high-performance energy storage applications

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Nano Research 2024年第9期17卷 8134-8144页

作者： Jihao Su Ling Yang Dengbin Yu Shaojun Dong State Key Laboratory of Electroanalytical Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China College of Chemistry Jilin UniversityChangchun 130022China University of Science and Technology of China Hefei 230026China

A significant challenge in developing high-performance hybrid supercapacitors(HSCs)is the need to reasonably construct advanced architectures that consist of various components and exhibit superior electrochemical capacitance *** FeCoNi-layered double hydroxide(FeCoNi-LDH)porous material has a specific capacitance of 1960 F·g^(-1)when used as the anode material at 1 A·g^(-1).The FeCoNi-LDH material exhibits nanoplates with a distinct spindle morphology on their *** to the combined action of the three metals and abundant oxygen vacancies,they exhibit unique rate performance and cycle *** electronic structure of LDH and the regulation of oxygen vacancy were confirmed by density functional theory(DFT)*** suggests that the strength of hydroxide can reduce the energy required for oxygen vacancy formation in FeCoNi-LDH nanosheets and enhance ion and charge transfer,as well as electrolyte adsorption on the electrode *** FeCoNi-LDH//activated carbon(AC)HSC has an energy density of 53.2 Wh·kg^(-1)at a power density of 800 W·kg^(-1),surpassing other devices composed of comparable materials during the same *** study made significant advances in the design and synthesis of a ternary LDH porous structure with distinct oxygen vacancies,as well as its potential application in electrochemical energy storage.

关键词： oxygen vacancy FeCoNi-layered double hydroxide(FeCoNi-LDH) theory calculation electrode material hybrid supercapacitor

Multifunctional carbon materials from rugose rose for energy storage and water purification

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Frontiers of Chemical Science and Engineering 2024年第9期18卷 1-13页

作者： Peng-Hui Li Hui Zhou Wen-Juan Wu Jiangsu Co-Innovation Center of Efficient Processing and Utilization of Forest Resources Nanjing Forestry UniversityNanjing 210037China College of Light Industry and Food Engineering Nanjing Forestry UniversityNanjing 210037China College of Chemical Engineering East China University of Science and TechnologyShanghai 200237China State Key Laboratory of Chemical Engineering Shanghai 200237China

With the advancement of social process,the resource problem is becoming more prominent,biomass materials come into being,and it is becoming more and more important to explore and prepare efficient and multifunctional biomass materials to alleviate the problems of energy storage and water *** this paper,nitrogen-doped hierarchical porous carbon materials(NRRC)were produced by one-step carbonization of withered rose as raw material and melamine as nitrogen source with KOH-activated *** resulting nitrogen-doped porous carbon material had the most abundant pores and the best microspherical graded pore structure,with a specific surface area of up to 1393 m2·g^(-1),a pore volume of 0.68 cm3·g^(-1),and a nitrogen-doped content of 5.52%.Electrochemical tests showed that the maximum specific capacitance of NRRC in the three-electrode system was 346.4 F·g^(-1)(0.5 A·g^(-1)),which was combined with favorable capacitance retention performance and cycling *** NRRC//NRRC symmetric supercapacitors were further assembled,and the maximum energy density of a single device was 23.88 Wh·kg^(-1),which still maintains excellent capacitance retention and cyclic charging/discharging *** example,the capacitance retention rate was always close to 96.27%with almost negligible capacitance loss after 10000 consecutive charge/discharge cycles(current density:10 A·g^(-1)).Regardless of the three-electrode or two-electrode system,the super capacitive performance of NRRC porous carbon materials was comparable to the electrochemical performance of many reported biomass porous carbon materials,which showed better energy storage advantages and practical application *** addition,NRRC porous carbon materials had excellent water purification *** dye adsorption test confirmed that NRRC had a high adsorption capacity(491.47 mg·g^(-1))for methylene *** undoubtedly also showed a potential and promising avenue for high value-added utilization

关键词： rose carbon adsorption electrode material electrochemical performance

Toward a function realization of multi-scale modeling for lithium-ion battery based on CHAIN framework

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Rare Metals 2023年第2期42卷 368-386页

作者： Bin Ma Han-Qing Yu Lu-Hua Yang Qi Liu Hai-Cheng Xie Si-Yan Chen Zheng-Jie Zhang Cheng Zhang Li-Sheng Zhang Wen-Tao Wang Xin-Hua Liu College of Automotive Engineering Jilin UniversityChangchun130022China School of Transportation Science and Engineering Beihang UniversityBeijing100191China Institute for Clean Growth&Future Mobility Coventry UniversityCoventryCV15FBUK

As the most mature portable power source,lithium-ion battery has become the mainstream of power source for electric vehicles(EVs)by virtue of its high energy density,long cycle life and relatively low ***,an excellent battery management system remained to be a problem for the operational states monitoring and safety guarantee for *** this paper,a function realization of multi-scale modeling is proposed based on cyber hierarchy and interactional network framework,realizing basic functions such as multi-scale mapping and cloud-based ***,to solve the problem of limited computing capability of the conventional vehicle-end battery management system,the novel system consists of hierarchies of side,edge and cloud,which are designed to take on different computing tasks methodically and swap data iteratively,providing specific services for drivers,enterprise users,*** to a series of promising features,this system has a large range of application scenarios as well as some critical bottlenecks,which will be discussed at the end of the *** check and confirm D.-***"is correctly identified in author ***’s not *** is no"D.-***"in author group,please just remove it.

关键词： Lithium-ion batteries(LIBs) electrode material Digital twins Algorithm Battery management Cyber hierarchy and interactional network(CHAIN)

A bird nest-like manganese dioxide and its application as electrode in supercapacitors

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Journal of Energy Chemistry 2013年第6期22卷 928-934页

作者： Fen Ran Huili Fan Lingren Wang Lei Zhao Yongtao Tan Xuanxuan Zhang Lingbin Kong Long Kang State Key Laboratory of Gansu Advanced Non-Ferrous Metal materials Lanzhou University of Technology Key Laboratory of Non-ferrous Metal Alloys and Processing of Ministry of Education Lanzhou University of Technology

A novel bird nest-like nanostructured MnO2(BNNS-MnO2) was prepared by a facile and cost-effective strategy. Their structures and morphologies were characterized by field emission scanning electron microscopy, transmission electron microscopy and powder X-ray diffraction. Capacitive behaviors were investigated by cyclic voltammetry and galvanostatic charge-discharge. The obtained nano-MnO2 possesses a well designed loose-assembled hierarchical nanoarchitecture with an appropriate crystallinity which gives rise to excellent performances as an electrode material for supercapacitors. A maximum specific capacitance of 917 F/g has been obtained at a current density of 5 mA/cm2 in 6 mol/L KOH aqueous solution, and a specific capacitance of 210 F/g has been maintained for 500 cycles. As the low cost of MnSO4 and KCr2O7 and the low reaction temperature, the present method avoids the requirements for complicated operations, time/energy-consuming and expensive reagents, and perhaps is ready for the industrialization of nano-MnO2 production.

关键词： energy storage nanostructured MnO2 supercapacitors electrochemical performance electrode material