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Tempura-like carbon/carbon composite as advanced anode materials for k-ion batteries

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Journal of Energy Chemistry 2021年第8期30卷 589-598,I0012页

作者： Hao-Jie Liang Zhen-Yi Gu Xue-Ying Zheng Wen-Hao Li Ling-Yun Zhu Zhong-Hui Sun Yun-Feng Meng Hai-Yue Yu Xian-kun Hou Xing-Long Wu MOE key Laboratory for UV Light-Emitting Materials and Technology Northeast Normal UniversityChangchun 130024China key Laboratory of Preparation and Application of Environmental Friendly Materials(Jilin Normal University) Ministry of EducationChangchun 130103China Institute of New Energy for Vehicles Tongji University201804 ShanghaiChina CAS key Laboratory of Nanosystem and Hierarchical Fabrication CAS Center for Excellence in NanoscienceNational Center for Nanoscience and Technology100190 BeijingChina Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringMOE Key Laboratory for Water Quality and Conservation of the Pearl River DeltaGuangzhou UniversityGuangzhou 510006China National&Local United Engineering Laboratory for Power batteries Faculty of ChemistryNortheast Normal UniversityChangchun 130024China

Graphite as a promising anode candidate of k-ion batteries(kIBs)has been increasingly studied currently,but corresponding rate performance and cycling stability are usually inferior to amorphous carbon *** protect the layer structure and further boost performance,tempura-like carbon/carbon nanocomposite of graphite@pitch-derived S-doped carbon(G@PSC)is designed and prepared by a facile and low-temperature modified molten salt *** robust encapsulation structure makes their respective advantages complementary to each other,showing mutual promotion of electrochemical performances caused by synergy *** a result,the G@PSC electrode is applied in kIBs,delivering impressive rate capabilities(465,408,370,332,290,and 227 m A h g^(-1)at 0.05,0.2,0.5,1,2,and 5 A g^(-1))and ultralong cyclic stability(163 m A g^(-1)remaining even after 8000 cycles at 2 A g^(-1)).On basis of ex-situ studies,the sectionalized k-storage mechanism with adsorption(pseudocapacitance caused by S doping)-intercalation(pitch-derived carbon and graphite)pattern is ***,the exact insights into remarkable rate performances are taken by electrochemical kinetics tests and density functional theory *** a word,this study adopts a facile method to synthesize high-performance carbon/carbon nanocomposite and is of practical significance for development of carbonaceous anode in kIBs.

关键词： k-ion batteries Anode materials Carbon/carbon composite S doping Cyclic stability DFT calculation

Designing a durable high-rate k_(0.45)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2) cathode for k-ion batteries:A joint study of theory and experiment

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Science China Materials 2022年第7期65卷 1741-1750页

作者： Rongbin Dang Qing-Bo Yan Enyue Zhao Na Li kang Wu Zhongjun Chen Zhonghua Wu Xiangfeng Liu Zhongbo Hu Xiaoling Xiao College of Materials Science and Optoelectronic Technology Center of Materials Science and Optoelectronics EngineeringUniversity of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

k-ion batteries(kIBs)hold great promise for large-scale energy ***,the absence of suitable cathode materials limits their practical ***,rationally designing advanced cathode materials for kIBs remains an open *** this work,based on density functional theory calculations,we find that the bond stability of Fe–O is higher than that of Co–O in layered transitional metal(TM)***,the k-ion migration in the Fe-based layered TM oxide has a significantly lower activation energy barrier than that in the Co-based *** on this theoretical prediction,we successfully synthesized a low-cost k_(0.45)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2)cathode,which shows excellent structural stability and superior k-storage properties,including durable cycle life and high-rate ***,the designed k_(0.45)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2)cathode possesses a great full-cell performance with a discharge capacity of~75 mA h g^(-1) and capacity retention of~80%after 100 *** results show that Fe has better structural stability and k-ion diffusion than high-cost Co in layered oxide cathodes,and this finding provides new insights into the design of low-cost and high-performance kIB layered *** work highlights the feasibility of a theory-guided experiment in screening promising battery materials.

关键词： k-ion batteries layered oxide cathode density functional theory k_(0.45)Ni_(0.1)Fe_(0.1)Mn_(0.8)O_(2)

In operando study of orthorhombic V_(2)O_(5) as positive electrode materials for k-ion batteries

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Journal of Energy Chemistry 2021年第11期30卷 627-636,I0015页

作者： Qiang Fu Angelina Sarapulova Lihua Zhu Georgian Melinte Alexander Missyul Edmund Welter Xianlin Luo Michael knapp Helmut Ehrenberg Sonia Dsoke Institute for Applied Materials(IAM) Karlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 1D-76344 Eggenstein-LeopoldshafenGermany Helmholtz Institute Ulm for Electrochemical Energy Storage(HIU) Helmholtzstrasse 1189081 UlmGermany Institute of Nanotechnology(INT) Karlsruhe Institute of Technology(KIT)Hermann-von-Helmholtz-Platz 1D-76344 Eggenstein-LeopoldshafenGermany CELLS-ALBA Synchrotron E-08290 Cerdanyola del VallesBarcelonaSpain Deutsches Elektronen-Synchrotron DESY Notkestraße 85D-22607 HamburgGermany

Herein, the electrochemical performance and the mechanism of potassium insertion/deinsertion in orthorhombic V_(2)O_(5) nanoparticles are studied. The V2O5 electrode displays an initial potassiation/depotassiation capacity of 200 mAh g^(−1)/217 mAh g^(−1) in the voltage range 1.5–4.0 V vs. k^(+)/k at C/12 rate, suggesting fast kinetics for potassium insertion/deinsertion. However, the capacity quickly fades during cycling, reaching 54 mAh g^(−1) at the 31st cycle. Afterwards, the capacity slowly increases up to 80 mAh g^(−1) at the 200th cycle. The storage mechanism upon k ions insertion into V2O5 is elucidated. In operando synchrotron diffraction reveals that V_(2)O_(5) first undergoes a solid solution to form k_(0.6)V_(2)O_(5) phase and then, upon further k ions insertion, it reveals coexistence of a solid solution and a two-phase reaction. During k ions deinsertion, the coexistence of solid solution and the two-phase reaction is identified together with an irreversible process. In operando XAS confirms the reduction/oxidation of vanadium during the k insertion/extraction with some irreversible contributions. This is consistent with the results obtained from synchrotron diffraction, ex situ Raman, X-ray photoelectron spectroscopy (XPS), and transmission electron microscopy (TEM). Moreover, ex situ XPS confirms the “cathode electrolyte interphase” (CEI) formation on the electrode and the decomposition of CEI film during cycling.

关键词： Orthorhombic V_(2)O_(5) In operando synchrotron diffraction In operando X-ray absorption spectroscopy k-ion batteries

Novel N-doped multichannel carbon nanofiber architecture with porous CoS nanoprisms for high-performance potassium-ion batteries

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Rare Metals 2024年第3期43卷 971-983页

作者： Jae Bong Lim Seung-keun Park Department of Advanced Materials Engineering Chung-Ang UniversityGyeonggi-do17546Republic of Korea Department of Intelligence Energy and Industry Chung-Ang UniversitySeoul06974Republic of Korea Western Seoul Center Korea Basic Science InstituteSeoul03759Republic of Korea

Potassium-ion batteries(PIBs)have gained significant attention as an alternative to lithium-ion batteries(LIBs)due to the abundance of potassium(k)and low ***,the difficulty in finding appropriate electrode materials that can efficiently store the larger k ions has hindered their practical ***,we report a novel anode material,N-doped multichannel carbon nanofibers embedded with porous CoS nanoprisms(CSP@NMCNF),for high-performance *** CSP@NMCNF was synthesized using a two-step strategy comprising of the electrospinning of Co acetate hydroxide nanoprism/binary polymer blend and a subsequent heat *** porous CoS nanoprisms with an anisotropic morphology were well aligned along the length axis of the N-doped multichannel carbon nanofibers,thus ensuring their structural stability during the repeated charge-discharge *** addition,numerous pores facilitated the transport of electrons and ***,the CSP@NMCNF anode exhibited excellent electrochemical performance,delivering a high specific capacity of 368 mAh·g^(-1)at 0.5 A·g^(-1)after 200 cycles and excellent rate capability(232 mAh·g^(-1)at 2.0 A·g^(-1)).

关键词： k-ion batteries Cobalt sulfide Multichannel structured composite Electrospinning Nanoprism Porous structure

Graphene effectively activating "dead" water molecules between manganese dioxide layers in potassium-ion battery

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Journal of Energy Chemistry 2024年第6期93卷 306-315,I0008页

作者： Xinhai Wang Wensheng Yang Shengshang Lu Shangshu Peng Tong Guo Quan Xie Qingquan Xiao Yunjun Ruan Institute of Advanced Optoelectronic Materials and Technology College of Big Data and Information EngineeringGuizhou UniversityGuiyang 550025GuizhouChina

Aqueous potassium-ion batteries(APIBs),recognized as safe and reliable new energy devices,are considered as one of the alternatives to traditional *** MnO_(2),serving as the main cathode,exhibits a lower specific capacity in aqueous electrolytes compared to organic systems and operates through a different reaction *** application of highly conductive graphene may effectively enhance the capacity of APIBs but could complicate the potassium storage *** this study,a MnO_(2) cathode pre-intercalated with k~+ions and grown on graphene(kMO@rGO) was developed using the microwave hydrothermal method for ***@rGO achieved a specific capacity of 90 mA h g^(-1) at a current density of 0.1 A g^(-1),maintaining a capacity retention rate of>90% after 5000 cycles at 5 A g^(-1).In-situ and exsitu characterization techniques revealed the energy-storage mechanism of kMO@rGO:layered MnO_(2)traps a large amount of "dead" water molecules during k~+ions ***,the introduction of graphene enables these water molecules to escape during k~+ ions insertion at the *** galvanostatic intermittent titration technique and density functional theory confirmed that kMO@rGO has a higher k~+ions migration rate than MnO_(2).Therefore,the capacity of this cathode depends on the interaction between dead water and k~+ions during the energy-storage *** optimal structural alignment between layered MnO_(2) and graphene allows electrons to easily flow into the external *** charge compensation forces numerous low-solvent k~+ions to displace interlayer dead water,enhancing the *** unique reaction mechanism is unprecedented in other aqueous battery studies.

关键词： Graphene k-ion batteries Mn-based layered oxide Water molecules Density functional theory

Designing N-doped graphene/ReSe_(2)/Ti_(3)C_(2) MXene heterostructure frameworks as promising anodes for high-rate potassium-ion batteries

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Journal of Energy Chemistry 2021年第2期30卷 155-162,I0006页

作者： Zhou Xia Xiwen Chen Haina Cia Zhaodi Fan Yuyang Yi Wanjian Yin Nan Wei Jingsheng Cai Yanfeng Zhang Jingyu Sun College of Energy Soochow Institute for Energy and Materials Innovations(SIEMIS)Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu ProvinceSoochow UniversitySuzhou 215006JiangsuChina Beijing Graphene Institute(BG1) Beijing 100095China Center for Nanochemistry(CNC) Academy for Advanced Interdisciplinary Studies.Department of Materials Science and EngineeringCollege of EngineeringPeking UniversityBeijing 100871China

Developing high-performance anodes for potassium ion batteries(kIBs) is of paramount significance but remains *** the normal sense,electrode materials are prepared by ubiquitous wet chemical routes,which otherwise might not be versatile enough to create desired heterostructures and/or form clean interfacial areas for fast transport of k-ions and *** this line,rate capability/cycling stability of resulting kIBs are greatly *** we present an all-chemical vapor deposition approach to harness the direct synthesis of nitrogen-doped graphene(NG)/rhenium diselenide(ReSe_2)hybrids over three-dimensional MXene supports as superior heterostructure anode material for *** such an innovative design,1 T'-ReSe2 nanoparticles are sandwiched in between the NG coatings and MXene frameworks via strong interfacial interactions,thereby affording facile k~+ diffusion,enhancing overall conductivity,boosting high-power performance and reinforcing structural stability of ***-constructed anode delivers an excellent rate performance of 138 mAh g^(-1) at 10.0 A g^(-1) and a high reversible capacity of 90 mAh g^(-1) at 5 A g^(-1) after 300 ***,the potassium storage mechanism has been systematically probed by advanced in situlex situ characterization techniques in combination with first principles computations.

关键词： k-ion batteries High-rate ReSe_(2) N-doped graphene Heterostructure

Graphite Anode for Potassium ion batteries: Current Status and Perspective

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Energy & Environmental Materials 2022年第2期5卷 458-469页

作者： Xiaodan Li Jinliang Li Liang Ma Caiyan Yu Zhong Ji Likun Pan Wenjie Mai Department of Physics Siyuan LaboratoryGuangdong Provincial Engineering Technology Research Center of Vacuum Coating Technologies and New Energy MaterialsJinan UniversityGuangzhou 510632China nternational Joint Laboratory of Renewable Energy Materials and Devices of Henan Province School of Physics&ElectronicsHenan UniversityKaifeng 475004China Shanghai key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200062China

With the increased demand from the storage of renewable energy sources,some safe and inexpensive energy storage technologies instead of Li-ion batteries become urgently ***,k-ion batteries(kIBs)have attracted much attention and evolved significant development because of the low price,safety,and similar property compared with Li-ion *** to the high reversibility,stability,and low potential plateau,graphite becomes a current research focus and is regarded as one of the most promising kIB’s anode *** this review,we mainly discuss the electrochemical reaction mechanism of graphite during potassiation-depotassiation process and analyze the effects of electrode/electrolyte interface on graphite for kion ***,we summarize several kinds of methods to improve the performance of graphite for kIBs,including the design of graphite structure,selection of appropriate binder,solvent chemistry,and salt ***,a concept of“relative energy density”is raised,which can be more accurate to evaluate the genuine electrochemical performance of graphite anode involving the specific capacity and *** addition,we also summarize the considerable challenges to current graphite anode in kIBs and we believe our work will offer alterative solutions to further explore high-performance graphite anode of k-ion storage.

关键词： electrochemical reaction mechanism graphite anode k-ion batteries methods to improve performance

New insights into carbon-based and MXene anodes for Na and k-ion storage: A review

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Journal of Energy Chemistry 2021年第11期30卷 660-691,I0016页

作者： Zhensheng Hong Hajar Maleki Tim Ludwig Yichao Zhen Michael Wilhelm Damin Lee kwang-Ho kim Sanjay Mathur Fujian Provincial key Laboratory of Quantum Manipulation and New Energy Materials College of Physics and EnergyFujian Normal UniversityFuzhou 350117FujianChina Institute of Inorganic Chemistry University of CologneGreinstr.650939 CologneGermany Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering Fuzhou 350117FujianChina Global Frontiers of Hybrid Interfacial Materials Pusan National UniversitySouth Korea

Na-ion batteries and k-ion batteries are promising alternatives to vastly used lithium-ion batteries mainly due to the larger natural abundance of sodium and potassium resources. Carbon-based and MXene materials have received increasing attention due to their unique layered structure to accommodate the larger sodium and potassium ions. It’s proposed that ionic size disparity (k^(+): 1.38 Å;Na^(+): 0.97 Å;Li^(+): 0.76 Å) leads to sluggish intercalation and extraction kinetics in larger alkali metal ions (AMIs). Nevertheless, the electrochemical inactivity of sodium intercalation in graphite suggests that different chemical properties of AMs and their interactions with carbon host and electrolytes is crucial for interfacial instability and irreversible capacity loss. Structural modifications by expanding interlayer spacing and defect engineering enable reduced diffusion barriers and enhanced insertion of sodium or potassium, but it blurs the electrochemical performance between battery and capacitor. This review provides insight into 2D carbon materials and their architectures for Na and k-ion batteries through an in-depth analysis of structure–property interdependence and different electrochemical mechanisms supported by both experimental and theoretical data to discuss the promises and challenges of post-lithium batteries. Finally, the perspectives and potential directions regarding material design concepts for 2D carbon-based nanomaterials and MXene phases for metal-ion storage are proposed.

关键词： Na-ion batteries k-ion batteries Anode Carbon materials Structure design

Advanced flame-retardant electrolyte for highly stabilized k-ion storage in graphite anode

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Science Bulletin 2022年第15期67卷 1581-1588,M0004页

作者： Hao-Jie Liang Zhen-Yi Gu Xin-Xin Zhao Jin-Zhi Guo Jia-Lin Yang Wen-Hao Li Bao Li Zhi-Ming Liu Zhong-Hui Sun Jing-Ping Zhang Xing-Long Wu key Laboratory for UV Light-Emitting Materials and Technology of Ministry of Education Northeast Normal UniversityChangchun 130024China Department of Chemistry Northeast Normal UniversityChangchun 130024China School of Chemistry and Chemical Engineering Henan Normal UniversityXinxiang 453007China College of Electromechanical Engineering Shandong Engineering Laboratory for Preparation and Application of High-performance Carbon-MaterialsQingdao University of Science and TechnologyQingdao 266061China Center for Advanced Analytical Science School of Chemistry and Chemical EngineeringKey Laboratory for Water Quality and Conservation of the Pearl River Delta of Ministry of EducationGuangzhou UniversityGuangzhou 510006China

Although graphite anodes operated with representative de/intercalation patterns at low potentials are considered highly desirable for k-ion batteries,the severe capacity fading caused by consecutive reduction reactions on the aggressively reactive surface is inevitable given the scarcity of effective protecting ***,by introducing a flame-retardant localized high-concentration electrolyte with retentive solvation configuration and relatively weakened anion-coordination and non-solvating fluorinated ether,the rational solid electrolyte interphase characterized by well-balanced inorganic/organic components is tailored in *** effectively prevented solvents from excessively decomposing and simultaneously improved the resistance against k-ion ***,the graphite anode retained a prolonged cycling capability of up to 1400 cycles(245 mA h g,remaining above 12 mon)with an excellent capacity retention of as high as 92.4%.This is superior to those of conventional and high-concentration ***,the optimized electrolyte with moderate salt concentration is perfectly compatible with graphite,providing a potential application prospect for k-storage evolution.

关键词： Graphite anode k-ion batteries Localized high-concentration electrolyte Interphase modification