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Entire onion source-derived redox porous carbon electrodes towards efficient quasi-solid-state solar charged hybrid supercapacitor

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Journal of Materials Science & Technology 2022年第30期125卷 118-127页

作者： Edugulla Girija Shankar Amit Kumar Das Jae Su Yu Department of Electronics and Information Convergence Engineering Institute for Wearable Convergence ElectronicsKyung Hee UniversityGyeonggi-do 17104Republic of Korea

Biomass-derived electrodes inherently containing redox-active species have gained extensive attention recently due to their availability,eco-friendliness,sustainability,and low cost.We report novel binder-free faradic surface redox onion-derived carbon positive electrode with nano regime particles by hydrothermal synthesis and Na^(+)and Cl^(−)ions diffused porous carbon negative electrode via a carbonization method.Energy-dispersive X-ray spectroscopy and X-ray photoelectron spectroscopy confirmed the presence of oxidized sulfur and(N-6)pyridinic N-based redox groups inherently present in the as-prepared compounds.The electrochemical analysis of the positive electrode revealed its faradic redox type of energy storage mechanism with an excellent specific capacitance of 1805 Fg^(-1) at the current density of 3 Ag^(-1) as well as appreciable long-term cycling stability(76.8%retention after 10000 charge-discharge cycles).Meanwhile,the negative electrode exhibited a maximum specific capacitance of 373 Fg^(-1) at 1 Ag^(-1) with outstanding long-term cycling stability(100.7%retention after 10000 cycles).The fabricated polyvinyl alcohol-potassium hydroxide gel electrolyte-based quasi-solid-state hybrid supercapacitor(QHSC)delivered excellent energy density and power density of 19.94 Wh kg^(-1) and 374.99 W kg^(-1),respectively with an ultralong cyclic life(102.3% retention)over 10000 cycles.Furthermore,the QHSC was connected to a solar panel to store renewable energy.Solar charged QHSC effectively powered a speedometer,enlightening its potential application in advanced sustainable energy storage systems.

关键词： Binder-free Biomass Green source hybrid supercapacitor Solar energy storage Faradic redox type

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Phosphorus-doped Ni–Co sulfides connected by carbon nanotubes for flexible hybrid supercapacitor

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Frontiers of Chemical Science and Engineering 2023年第5期17卷 491-503页

作者： Shengwang Su Li Sun Feng Xie Jialong Qian Yihe Zhang Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of GeosciencesBeijing 100083China

As promising electrode materials for supercapacitors,nickel-cobalt bimetallic sulfides render the advantages of abundant redox reactions and inherently high conductivity.However,in general,unsatisfactory performance of low specific capacity,low rate capability,and fast capacity loss exist in Ni–Co sulfide electrodes.Herein,we rationally regulate phosphorus-doped nickel–cobalt sulfides(P-NCS)to enhance the electrochemical performance by gas–solid phosphorization.Moreover,carbon nanotubes(CNTs)as conductive additives are added to improve the cycle stability and conductivity and form the composite P-NCS/C/CNT.According to density functional theory,more electrons near the Fermi surface of P-NCS are demonstrated notionally than those of simple CoNi2S4.Electrochemical results manifest that P-NCS/C/CNT exhibits superior electrochemical performance,e.g.,high specific capacity(932.0 C·g^(-1)at 1 A·g^(-1)),remarkable rate capability(capacity retention ratio of 69.1%at 20 A·g^(-1)),and lower charge transfer resistance.More importantly,the flexible hybrid asymmetric supercapacitor is assembled using P-NCS/C/CNT and activated carbon,which renders an energy density of 34.875 W·h∙kg^(-1)at a power density of 375 W∙kg^(-1).These results show that as-prepared P-NCS/C/CNT demonstrates incredible possibility as a battery-type electrode for high-performance supercapacitors.

关键词： cobalt nickel sulfide phosphorus-doping hybrid supercapacitor carbon nanotube density functional theory

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Performance of PbO_2/activated carbon hybrid supercapacitor with carbon foam substrate

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Chinese Chemical Letters 2012年第5期23卷 623-626页

作者： Wu Zhang Yao Hui Qu Li Jun Gao Department of Chemistry Nanchang UniversityNanchang 330031China School of Energy Soochow UniversitySuzhou 215006China

PbO_2/activated carbon（AC） hybrid supercapacitor in H_2SO_4 with a carbon foam current collector is studied.The PbO_2/AC hybrid is designed with electrodeposited PbO_2 thin film as positive electrode to match with AC negative electrode.The discharge curve shows capacitive characteristics between 1.88 V and 0.65 V.The hybrid system exhibits excellent energy and power performance,with specific energy of 43.6 Wh/kg at a power density of 654.2 W/kg.The use of carbon foam current collector ensures stability of the PbO_2 electrode in H_2SO_4 environment.After 2600 deep cycles at 15 C high rate of charge/discharge,the capacity remains nearly unchanged from its initial value.

关键词： hybrid supercapacitor Lead dioxide Activated carbon Carbon foam

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Flexible hybrid supercapacitor Constructed via Conductive NiCo2O4 Nano-anchors Fixed Hierarchical MOF Nanosheets and Supported Coaxial Polypyrrole Nanorod Arrays

Flexible Hybrid Supercapacitor Constructed via Conductive Ni...

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中国化学会第十届全国无机化学学术会议

作者： Feng Zhang Jinjin Ma Yangyi Yang School of Chemistry and Pharmaceutical Engineering Huanghuai University School of Materials Science and Engineering Sun Yat-sen University

The difficulties in directly grown on current collector of electrode materials largely thwarts their maximum performance for energy storage. Herein, a "one for two" strategy of employing NiCoO nanowires(NWAs) both as conductive "nano-anchors" and as strain buffer "support" to synthesize electrodes of a hybrid supercapacitor(HSC) was successfully developed. Specifically, for the positive electrode, to improve the overall electrical conductivity and active surface area of MOFs, NiCoO NWAs on surface of carbon cloth as the interconnected anchors for in situ growth of MOFs nanosheets. The as-synthesized NiCoO@Ni-MOF electrode shows high areal capacitance(7.23 F cm-2 at a current density of 5 mA cm), and good rate capability. Meanwhile, NiCoO NWAs are used as the strain buffer supports for preparing core-shell NiCoO@PPy nanorod arrays as negative electrode. As a result, the HSC is successfully assembled by using the NiCoO@Ni-MOF and NiCoO@PPy as electrodes, achieving both high volumetric capacitance and energy density. This study not only presents a "one for two" strategy for effectively fabricating binder-free energy storage electrodes but also offers a route to enhance the conductivity of MOF-based electrode materials.

关键词： metal-organic framework hybrid supercapacitor hierarchical nanosheet

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Al Doped Co Hydroxyl Fluoride Nanosheet Arrays as Efficient Faradic Electrode for hybrid supercapacitor

Al Doped Co Hydroxyl Fluoride Nanosheet Arrays as Efficient ...

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中国化学会第十届全国无机化学学术会议

作者： Jiuli Chang Liming Chen Dapeng Wu Fang Xu Kai Jiang Zhiyong Gao School of Chemistry and Chemical Engineering Henan Normal University

The regulations of phases,morphologies,surface wettability and oxidation values of surface metal sites are fundimental ways to optimize the surface associated capacitive and catalytic properties of metal compounds[1,2].Fand Alare unique ions with high electronegativity or ionic potential,which are capable of tuning the oxidation values,surface polarities and further the redox activities of transition metal compounds.Herein,Al doped Co hydroxyl fluoride(Al-Co(OH)F) with vertically aligned nanosheets arrays configuration onto Ni foam substrate was prepared by hydrolysis of Co precursor mediated by Fand Alions (Figure 1).Due to the vertical electron and ions transfer channels along the nanosheets arrays,as well as the enhanced oxidation values of Co element induced by the robust electrons withdrawing abilities of Fand Alions,the resultant Al-Co(OH)F faradic electrode is capable of offering a maximum specific capacitance (C) of 1576 F g at 1.0 A g,and 624 F g is still maintained at the high current density of 20 A g.Additionally,84%of its initial Cs is maintained undergoes 5000 repeated charge-discharge cycles at 5 A g.When used as faradic electrode of hybrid supercapacitor (HSC),high energy density (Ecell) of 42.7 Wh kg at power density (Pcell) of382.6 W kg was harvested,and E declines to 18.2 Wh kg with P increases to 3123.5 W kg,showing the potential of Al-Co(OH)F in faradic energy storage.

关键词： Co hydroxyl fluoride Al doping faradic capacitance nanosheets array hybrid supercapacitor

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一步法构筑双功能富含氧空位的花瓣状镍铝水滑石纳米薄片用于高性能超级电容器和尿素氧化

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Science China Materials 2022年第7期65卷 1805-1813页

作者：王宇辰刘瑶钰张曼刘碧莹赵志月严凯 Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology School of Environmental Science and EngineeringSun Yat-sen UniversityGuangzhou 510275China

镍基水滑石在能量存储(超级电容器)和转化(尿素氧化)领域是很有前景的电极材料.合理构建镍基水滑石的原子和电子结构对于实现其理想的电化学性能至关重要.本论文报道了一种简单、环境友好的一步法制备富含氧空位的花瓣状镍铝水滑石(NiAl... 详细信息

镍基水滑石在能量存储(超级电容器)和转化(尿素氧化)领域是很有前景的电极材料.合理构建镍基水滑石的原子和电子结构对于实现其理想的电化学性能至关重要.本论文报道了一种简单、环境友好的一步法制备富含氧空位的花瓣状镍铝水滑石(NiAl-LDHs)纳米薄片用于混合超级电容器和尿素氧化.性能最好的富氧空位NiAl-LDHs纳米薄片具有216.6 m^(2) g^(-1)的大比表面积和3.45×10^(-4)S cm^(-1)的高电导率,可在1 A g^(-1)的比电流下展示出2801 F g^(-1)(700 C g^(-1))的超高比电容.基于NiAl-LDHs//商业活性炭组装的混合超级电容器在400 W kg^(-1)比功率密度下可获得50.0 W h kg^(-1)的比能量,且循环10,000次后仍有91%的电容保持率.同时,NiAl-LDHs纳米薄片作为高效的尿素氧化电催化剂,在1 mol L^(-1)KOH和0.33 mol L^(-1)尿素中仅需1.42 V vs.可逆氢电极的氧化电位就可达到10 mA cm^(-2)的电流密度.由于NiAl-LDHs的纳米薄片结构暴露了更多的活性位点和丰富的氧空位,其电化学性能优于大部分报道的镍基水滑石.因此,本研究为多功能纳米能源材料的合理设计奠定了良好的基础.

关键词： layered double hydroxides nanosheets oxygen vacancy hybrid supercapacitor urea oxidation reaction

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Preparation of chitosan and citric acid crosslinked membrane and its application in quasi-solid supercapacitors

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Rare Metals 2023年第2期42卷 430-437页

作者： Hao-Hang Xu Liang Yue Yang Tang Fan Liu Hong-Jiu Zhu Shu-Juan Bao Institute for Clean Energy&Advanced Materials School of Materials and EnergySouthwest UniversityChongqing400715China

Quasi-solid electrolytes promote the development of safe and flexible energy storage devices.In this work,a chitosan and citric acid crosslinked membrane is prepared by a freeze-thaw cross-linking method,in which the chemical crosslinking of chitosan and citric acid increase the viscoelastic behavior of the polymer membrane,and the freeze-thaw assist freeze drying process to create abundant interconnected open-pores and three-dimensional(3D)network.Due to the good viscoelasticity,excellent electrolyte loading capacity(596%)and high ion conductivity(7.7×10^(-3)S·cm^(-)1),as quasi-solid electrolyte,our proposed chitosan and citric acid crosslinked membrane helps ZnICCFT-ZnSO4lAC hybrid supercapacitor to delivers wide operating voltage,high specific capacity of 100.5 F·g^(-1)and stable cycle life(93%after1000 cycles),which suggests that our proposed freezethaw assisted freeze drying method has great potential in designing quasi-solid state electrolyte for energy storage device.

关键词： Quasi-solid electrolyte Chitosan Freeze-thaw hybrid supercapacitor

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Lithiation-induced controllable vacancy engineering for developing highly active Ni_(3)Se_(2) as a high-rate and large-capacity battery-type cathode in hybrid supercapacitors

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Journal of Energy Chemistry 2023年第3期78卷 37-46,I0002页

作者： Yinna He Ting Liu Jiangnan Song Yiwei Wang Yuxiao Zhang Jie Feng Alan Meng Guicun Li Lei Wang Jian Zhao Zhenjiang Li College of Chemistry and Molecular Engineering Qingdao University of Science and TechnologyQingdao 266042ShandongChina College of Materials Science and Engineering College of Electromechanical EngineeringQingdao University of Science and TechnologyQingdao 266042ShandongChina

The poor rate capability and low capacity are huge barriers to realize the commercial applications of battery-type transition metal compounds(TMCs) cathode.Herein,numerous Se vacancy defects are introduced into the Ni_(3)Se_(2)lamellas by pre-lithiation technique,which can be acted as a novel class of battery-type cathode for hybrid supercapacitors.Appropriately modulating the contents of the preembedded lithium(Li) ions can induce a controllable vacancy content in the series of as-prepared products,effectively endowing a fast reaction kinetic and high activity for the cathode.Benefiting from the distinct design,the optimized cathode(Li2-Ni_(3)Se_(2)) presents a high specific capacity of 236 mA h g^(-1)at1 A g^(-1),importantly,it can still possess 117 mA h g^(-1)when the current density is increased up to 100A g^(-1),exhibiting relatively high rate capability.It is much superior to other battery-type TMC cathodes reported in previous studies.Moreover,the cathode also shows the excellent cycling stability with 92%capacity retention after 3,000 cycles.In addition,a hybrid supercapacitor(HSC) is assembled with the obtained Li2-Ni_(3)Se_(2)as the cathode and active carbon(AC) as the anode,which delivers a high energy density of 77 W h kg^(-1)at 4 kW kg^(-1)and long-term durability(90% capacitance retention after 10,000 cycles).Therefore,the strategy not only provides an effective way to realize the controllable vacancy content in TMCs for achieving high-perfo rmance cathodes for HSC,but also further promotes their large-scale applications in the energy storage fields.

关键词： Pre-lithiation Selenium vacancies High-rate Battery-type cathode hybrid supercapacitor

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In situ growth of hydrophilic nickel-cobalt layered double hydroxides nanosheets on biomass waste-derived porous carbon for high-performance hybrid supercapacitors

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Green Chemical Engineering 2022年第1期3卷 55-63页

作者： Yuchen Wang Yaoyu Liu Zuo Chen Man Zhang Biying Liu Zhenhao Xu Kai Yan School of Environmental Science and Engineering Sun Yat-sen UniversityGuangzhou510275China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou510275China

Rational design and cost-effective fabrication of layered double hydroxides(LDHs)nanosheets with extraordinary electrochemical performance is a key challenge for hybrid supercapacitors(HSCs).Herein,we report a facile in situ growth methodology to eco-friendly synthesize hydrophilic Ni Co-LDHs nanosheets on biomass waste-derived porous carbon(BC)for robust high-performance HSC cathode.The in situ growth process under ultrasonication realizes the rational arrangement of Ni Co-LDHs nanosheets on the surface of BC,which effectively increases the specific surface area,promotes the electronic conductivity and enhances the wettability of Ni Co-LDHs nanosheets without affecting their thickness values.With the beneficial effects of ultrathin thickness of LDHs nanosheets(6.20 nm),large specific surface area(2324.1 m^(2)g^(-1)),low charge transfer resistance(1.65Ω),and high wettability with electrolyte(34°–35°),the obtained Ni2Co1-LDHs/BC50 electrode possesses an ultra-high specific capacitance of 2390 F g^(-1)(956 C g^(-1))at 1 A g^(-1),which is superior to most reported values.Furthermore,an assembled Ni_(2)Co_(1)-LDHs/BC50//YP-80F HSC delivers a maximum specific energy of 52.47 Wh kg^(-1)at375 W kg^(-1),and maintains a high capacitance retention of 75.9%even after 4000 cycles.This work provides a facile approach to fabricate LDHs nanosheets based cathode materials for high-performance HSCs.

关键词： Layered double hydroxides Nanosheets Biomass-derived porous carbon Wettability hybrid supercapacitor

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Chestnut shell-like N-doped carbon coated NiCoP hollow microspheres for hybrid supercapacitors with excellent electrochemical performance

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Frontiers of Materials Science 2022年第1期16卷 141-155页

作者： Liangshuo LI Lin QIN Xin FAN Xinyu LI Guangxi Key Laboratory of Optical and Electronic Materials and Devices College of Materials Science and EngineeringGuilin University of TechnologyGuilin 541004China College of Science Guilin University of TechnologyGuilin 541004China

In this work,transition metal phosphides(TMPs)were reinforced by a solvothermal synthesis method and in situ polymerization in dopamine with one-step phosphating and carbonizing process to form chestnut shell-like N-doped carbon coated NiCoP(NiCoP@N-C)hollow microspheres.Excellent morphologic structure is still reflected in NiCoP@N-C,which is suitable for rapid electron and electrolyte transfer.Benefiting from the excellent structure,the coating of N-doped carbon,and the synergistic effect of Ni and Co,NiCoP@N-C reveals excellent electrochemical properties(high specific capacitance of 1660 F·g^(-1)(830 C·g^(-1))at 1 A·g^(-1)).In addition,a NiCoP@N-C//carbonization HKUST-1(HC)achieves high specific energy of 51.8 Wh·kg^(-1),ultrahigh specific power of 21.63 kW·kg^(-1),and excellent cycling stability up to 10000 cycles(a capacitance retention of 96.7%).The results show that the NiCoP@N-C electrode material has a wide application in supercapacitors and other energy storage devices.

关键词： chestnut shell-like sphere hybrid supercapacitor NiCoP@N-C N-doped carbon

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