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Nickel embedded porous macrocellular carbon derived from popcorn as sulfur host for high-performance lithium-sulfur batteries

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Journal of Materials Science & Technology 2021年第15期74卷 69-77页

作者： Wenjuan Wang Yan Zhao Yongguang Zhang Ning Liu Zhumabay Bakenov School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China Institute of Batteries LLC School of Engineering and Digital SciencesNational Laboratory AstanaNazarbayev University53 Kabanbay Batyr AvenueNur-Sultan 010000Kazakhstan

Due to the demands for high performance and ecological and economical alternatives to conventional lithium-ion batteries(Li Bs),the development of lithium-sulfur(Li-S)batteries with remarkably higher theoretical capacity(1675 m A h g-1)has become one of the extensive research focus directions worldwide.However,poor conductivity of sulfur,critical cyclability problems due to shuttle of polysulfides as intermediate products of the cathodic reaction,and large volume variation of the sulfur composite cathode upon operation are the major bottlenecks impeding the implementation of the next-generation Li-S batteries.In this work,a unique three-dimensional(3D)interconnected macrocellular porous carbon(PC)architecture decorated with metal Ni nanoparticles was synthesized by a simple and facile strategy.The as-fabricated Ni/PC composite combines the merits of conducting carbon skeleton and highly adsorptive abilities of Ni,which resulted in efficient trapping of lithium polysulfides(Li PSs)and their fast conversion in the electrochemical process.Owing to these synergistic advantageous features,the composite exhibited good cycling stability(512.3 mA h g^(-1)after 1000 cycles at 1 C with an extremely low capacity fading rate 0.03%per cycle),and superior rate capability(747.5 mA h g^(-1)at 2 C).Accordingly,such Ni nanoparticles embedded in a renewable puffed corn-derived carbon prepared via a simple and effective route represent a promising active type of sulfur host matrix to fabricate high-performance Li-S batteries.

关键词： Biomass-derived porous carbons Cathodes Lithium-sulfur batteries Ni nanoparticles

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Defect-rich porous tubular graphitic carbon nitride with strong adsorption towards lithium polysulfides for high-performance lithium-sulfur batteries

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Journal of Materials Science & Technology 2022年第20期115卷 140-147页

作者： Heng Ma Xin Liu Ning Liu Yan Zhao Yongguang Zhang Zhumabay Bakenov Xin Wang School of Materials Science and Engineering Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control TechnologyHebei University of TechnologyTianjin 300130China Institute of Batteries LLC School of Engineering and Digital SciencesNational Laboratory AstanaNazarbayev University53 Kabanbay Batyr AvenueNur-Sultan 010000Kazakhstan South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at ZhaoqingSouth China Normal UniversityGuangzhou 510006China

The commercialization of the lithium-sulfur(Li-S)batteries is severely hampered by the shuttle effect and sluggish kinetics of lithium polysulfides(Li PSs).In this study,porous tubular graphitic carbon nitride(PTCN)was synthesized as the sulfur host by hydrothermal treatment,thermal shock and etching methods.By etching technology,the hollow nanotube tentacles grow on the tube wall of PTCN,the mesoporous appears on the inner wall,and a large number of nitrogen defects are introduced.The verticallyrooted hollow nanotube tentacles on the PTCN surface facilitate electron conduction for sulfur redox reactions.The hollow and porous architecture exposes plentiful active interfaces for accelerated redox conversion of polysulfide.Furthermore,the nitrogen defects in PTCN enable more excellent intrinsic conductivity,higher adsorbability and conversion catalytic activity to Li PSs.Based on the above synergetic effect,the batteries with PTCN/S cathodes realize a high discharge capacity of 504 m Ah g^(-1) at 4 C and a stable cycling behavior over 500 cycles with a low capacity decay of 0.063%per cycle.The results indicate a promising approach todesigning a high performance electrode material for Li-S batteries.

关键词： Lithium-sulfur batteries Porous tubular graphitic carbon nitride Sulfur host Nitrogen defects

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Oxidized Nb_(2)C MXene as catalysts for lithium-sulfur batteries:Mitigating the shuttle phenomenon by facilitating catalytic conversion of lithium polysulfides

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Journal of Materials Science & Technology 2022年第24期119卷 45-52页

作者： Cailing Song Wen Zhang Qianwen Jin Yan Zhao Yongguang Zhang Xin Wang Zhumabay Bakenov School of Materials Science and Engineering State Key Laboratory of Reliability and Intelligence of Electrical EquipmentHebei University of TechnologyTianjin 300130China South China Academy of Advanced Optoelectronics&International Academy of Optoelectronics at Zhaoqing South China Normal UniversityGuangzhou 510006China Department of Chemical and Materials Engineering National Laboratory AstanaInstitute of Batteries LLPNazarbayev UniversityNur-Sultan 010000Kazakhstan

Extensive research has been devoted to lithium-sulfur(Li-S)batteries due to their overwhelming promises and advantages such as high theoretical capacity(1675 m Ah g^(-1)),extremely cost effectiveness and abundance and availability of sulfur.Nevertheless,a sluggish electrochemical kinetics of the battery limited by a slow conversion of lithium polysulfide(LiPSs)intermediates and Li PSs shuttle effect severely hinder its development towards industrial application.Herein,we designed the oxidized Nb2_(C)MXene with amorphous carbon(Nb_(2)O_(5)/C)composites as sulfur host using CO_(2)treatment to address the above issues.The Nb_(2)O_(5)/C composites with high conductivity are directly employed as sulfur hosts for Li-S battery capable to remarkably mitigate the shuttle phenomenon due to a combined effect of their Li PSs trapping ability and catalytic activity towards their accelerated conversion.Meanwhile,the unique layered structure of the composite facilitates ion transfer and accommodates the volume changes of the cathode during cycling.With this rational design,the resultant Li-S batteries exhibit superior electrochemical performance with a high initial specific capacity of 745 m Ah g^(-1)at 1.0 C and a reversible capacity of 620 m Ah g^(-1)at a high rate cycling at 3.0 C.

关键词： Oxidized Nb_(2)C MXene Li-S batteries Lithium polysulfides conversion Electrochemical performance

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Dealloying-derived nanoporous deficient titanium oxide as high-performance bifunctional sulfur host-catalysis material in lithium-sulfur battery

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Journal of Materials Science & Technology 2021年第25期84卷 124-132页

作者： Ning Liu Heng Ma Lu Wang Yan Zhao Zhumabay Bakenov Xin Wang School of Materials Science and Engineering Tianjin Key Laboratory of Materials Laminating Fabrication and Interface Control TechnologyHebei University of TechnologyTianjin 300130China Institute of Batteries LLC Department of Chemical and Materials EngineeringNational Laboratory AstanaNazarbayev University53 Kabanbay Batyr AvenueNur-Sultan 010000Kazakhstan South China Academy of Advanced Optoelectronics International Academy of Optoelectronics at ZhaoqingSouth China Normal UniversityGuangzhou 510006China

In this work,we report a facile dealloying strategy to tailor the surface state of nanoporous TiO_(2) towards high-efficiency sulfur host material for lithium-sulfur(Li-S)batteries.When used as a sulfur cathode material,the oxygen-deficient TiO_(2)-xexhibits enhanced lithium polysulfides(Li PS)adsorption and conversion kinetics that effectively tackle the shuttle effect in lithium-sulfur batteries.The excellent ability of the oxygen vacancy sites on TiO_(2)-xsurface to trap Li PS is proved by experimental observations and density functional theory(DFT)calculations.Meanwhile,it also promotes conversion kinetics of lithium polysulfides,as verified by the asymmetric cell experiment.Accordingly,compared with the S/TiO_(2) cathode,the oxygen-deficient S/TiO_(2)-xelectrode exhibits preeminent rate and cycling performance in lithium-sulfur batteries:it delivers an ultra-low capacity decay of 0.039%per cycle after 1000 cycles at 1 C.Tunning the surface state of metal oxides by dealloying method offers a new facile strategy to design efficient sulfur cathode materials for lithium-sulfur batteries.

关键词： Li-S battery Oxygen defects TiO_(2)-x Dealloying Cathode

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A porous puckered V_(2)O_(5) polymorph as new high performance cathode material for aqueous rechargeable zinc batteries

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Journal of Energy Chemistry 2021年第10期30卷 459-468,I0012页

作者： Dauren Batyrbekuly Barbara Laïk Jean-Pierre Pereira-Ramos Zhumabay Bakenov Rita Baddour-Hadjean Institut de Chimie et des Matériaux Paris Est(ICMPE) UMR 7182 CNRS et UniversitéParis Est Créteil2 rue Henri Dunant94320 ThiaisFrance School of Engineering National Laboratory AstanaNazarbayev University53 Kabanbay Batyr AvenueAstana 010000Kazakhstan

Aqueous rechargeable zinc batteries are getting increasing attention for large-scale energy storage owing to their advantages in terms of cost,environmental friendliness and safety.Here,the layered puckeredγ’-V_(2)O_(5) polymorph with a porous morphology is firstly introduced as cathode for an aqueous zinc battery system in a binary Zn^(2+)/Li^(+)electrolyte.The Zn‖γ’-V_(2)O_(5) cell delivers high capacities of 240 and190 mAh g^(-1) at current densities of 29 and 147 mA g^(-1),respectively,and remarkable cycling stability in the 1.6 V-0.7 V voltage window(97%retention after 100 cycles at 0.15 A g^(-1)).The detailed structural evolution during first discharge-charge and subsequent cycling is investigated using X-ray diffraction and Raman spectroscopy.We demonstrate a reaction mechanism based on a selective Li insertion in the1.6 V-1.0 V voltage range.It involves a reversible exchange of 0.8 Li^(+)in γ’-V_(2)O_(5) and the same structural response as the one reported in lithiated organic electrolyte.However,in the extended 1.6 V-0.7 V voltage range,this work puts forward a concomitant and gradual phase transformation from γ’-V_(2)O_(5) to zinc pyrovanadate Zn_(3)V_(2)O_(7)(OH)2.2 H_(2)O(ZVO)during cycling.Such mechanism involving the in-situ formation of ZVO,known as an efficient Zn and Li intercalation material,explains the high electrochemical performance here reported for the Zn‖γ’-V_(2)O_(5) cell.This work highlights the peculiar layered-puckeredγ’-V_(2)O_(5) polymorph outperforms the conventionalα-V_(2)O_(5) with a huge improvement of capacity of 240 mAh g^(-1)vs 80 mAh g^(-1) in the same electrolyte and voltage window.

关键词： Vanadium pentoxide γ-V_(2)O_(5) Cathode Aqueous zinc battery High performance Layered structure Energy storage Renewable energy

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Enhanced cycle performance of Li/S battery with the reduced graphene oxide/activated carbon functional interlayer

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Journal of Energy Chemistry 2017年第6期26卷 1276-1281页

作者： Haipeng Li Liancheng Sun Yongguang Zhang Taizhe Tan Gongkai Wang Zhumabay Bakenov School of Materials Science&Engineering Research Institute for Energy Equipment MaterialsHebei University of TechnologyTianjin 300130China Synergy Innovation Institute of GDUT Heyuan 517000GuangdongChina Nazarbayev University Institute of Batteries LLC53 Kabanbay Batyr AvenueAstana 010000Kazakhstan

The high-energy lithium/sulfur(Li/S) battery has become a very popular topic of research in recent years due to its high theoretical capacity of 1672 m Ah/g. However, the polysulfide shuttle effect remains of great concern with a great number of publications dedicated to its mitigation. In this contribution, a three-dimensional(3D) reduced graphene oxide/activated carbon(RGO/AC) film, synthesized by a simple hydrothermal method and convenient mechanical pressing, is sandwiched between the separator and the sulfur-based cathode, acting as a functional interlayer to capture and trap polysulfide species. Consequently, the Li/S cell with this interlayer shows an impressive initial discharge capacity of 1078 m Ah/g and a reversible capacity of 655 m Ah/g even after 100 cycles. The RGO/AC interlayer impedes the movement of polysulfide while providing unimpeded channels for lithium ion mass transfer. Therefore, the RGO/AC interlayer with a well-designed structure represents strong potential for high-performance Li/S batteries.

关键词： Lithium/sulfur battery Shuttle effect Functional interlayer Reduced graphene oxide/activated carbon composite

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Single Zn atoms anchored on hollow carbon nanofiber network for dendrite-free lithium metal anode of flexible Li–S full cell

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Rare Metals 2023年第11期42卷 3705-3717页

作者： Zhi-Feng Wang Hong-Ying Wang Xiao-Li Liu Yan-Xu Chen Yan Zhao Yong-Guang Zhang Qi-Qi Han Chun-Ling Qin Zhumabay Bakenov Yi-Chao Wang Xin Wang School of Materials Science and Engineering Hebei University of TechnologyTianjin300401China School of Materials Science and Engineering Hebei University of Science and TechnologyShijiazhuang050018China South China Academy of Advanced Optoelectronics and International Academy of Optoelectronics at Zhaoqing South China Normal UniversityGuangzhou510006China Shanxi Supercomputing Center Lvliang033000China Department of Chemical and Materials Engineering National Laboratory AstanaNazarbayev University010000Nur-SultanKazakhstan School of Life and Environmental Sciences Deakin UniversityWaurn PondsGeelongVIC3216Australia

The attractive energy density of lithium-sulfur(Li-S)batteries makes them desirable energy storage systems;however,the slow reaction kinetics and formation of lithium dendrites prevent them from reaching full potential.To address this issue,hierarchical porous carbon nanofibers network containing Zn single atoms(ZnSA@HPCNF)is synthesized by electrospinning and carbonization.This structure serves as the main anode body,providing excellent chemical anchoring and lipophilicity.The uniform distribution of Zn single atoms and N4coordination supports uniform deposition and continuous plating/stripping of lithium.The results show that the Li|Li/ZnSA@HPCNF symmetrical battery presents stable and low overpotential during 700-and 900-h iterative plating/stripping process at1 and 5 mA·cm^(-2),respectively.Furthermore,the S/CNT||Li/ZnSA@HPCNF full cell shows good flexibility,reversible capacity and cycling stability.This work provides a lithium host strategy based on single-atom dispersed hierarchical porous carbon network,enabling the design of rational lithium metal anodes for use in flexible Li-S full cells.

关键词： Single atom Lithium metal anode Lithium deposition Lithium-sulfur battery

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