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Carbon nanocages bridged with graphene enable fast kinetics for dual-carbon lithium-ion capacitors

Green Energy & Environment 2024年第3期9卷 573-583页

作者： Shani Li Yanan Xu Wenhao Liu Xudong Zhang Yibo Ma Qifan Peng Xiong Zhang Xianzhong Sun Kai Wang Yanwei Ma Institute of Electrical Engineering Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China Innovation Academy for Green Manufacture Beijing100190China Beijing Institute of Technology Beijing100081China School of Materials Science and Engineering Zhengzhou UniversityZhengzhou450001China

lithium-ion capacitors(LICs) combining the advantages of lithium-ion batteries and supercapacitors are considered a promising nextgeneration energy storage device. However, the sluggish kinetics of battery-type anode cannot match the capacitor-type cathode, restricting the development of LICs. Herein, hierarchical carbon framework(HCF) anode material composed of 0D carbon nanocage bridged with 2D graphene network are developed via a template-confined synthesis process. The HCF with nanocage structure reduces the Li^(+) transport path and benefits the rapid Li^(+) migration, while 2D graphene network can promote the electron interconnecting of carbon nanocages. In addition, the doped N atoms in HCF facilitate to the adsorption of ions and enhance the pseudo contribution, thus accelerate the kinetics of the anode. The HCF anode delivers high specific capacity, remarkable rate capability. The LIC pouch-cell based on HCF anode and active HCF(a-HCF) cathode can provide a high energy density of 162 Wh kg^(-1) and a superior power density of 15.8 kW kg^(-1), as well as a long cycling life exceeding 15,000cycles. This study demonstrates that the well-defined design of hierarchical carbon framework by incorporating 0D carbon nanocages and 2D graphene network is an effective strategy to promote LIC anode kinetics and hence boost the LIC electrochemical performance.

关键词： Hierarchical carbon framework Nanocage ZIF Graphene lithium-ion capacitors

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Insights into Formation and Li-Storage Mechanisms of Hierarchical Accordion-Shape Orthorhombic CuNb2O6 toward lithium-ion capacitors as an Anode-Active Material

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Energy & Environmental Materials 2024年第2期7卷 291-302页

作者： Chao Cheng Yunsheng Yan Minyu Jia Yang Liu Linrui Hou Changzhou Yuan School of Material Science and Engineering University of Jinan

The orthorhombic CuNb2O6（O-CNO） is established as a competitive anode for lithium-ion capacitors（LICs） owing to its attractive compositional/structural ***,the high-temperature synthesis（>900 ℃） and controversial charge-storage mechanism always limit its ***,we develop a low-temperature strategy to fabricate a nano-blocksconstructed hierarchical accordional O-CNO framework by employing multilayered Nb2CTxas the niobium *** intrinsic stress-induced formation/transformation mechanism of the monoclinic CuNb2O6to O-CNO is tentatively put ***,the integrated phase conversion and solid solution lithium-storage mechanism is reasonably unveiled with comprehensive in（ex） situ *** to its unique structural merits and lithium-storage process,the resulted O-CNO anode is endowed with a large capacity of 150.3 mAh g-1at 2.0 A g-1,along with longduration cycling ***,the constructed O-CNO-based LICs exhibit a high energy(138.9 Wh kg-1) and power(4.0 kW kg-1) densities with a modest cycling stability（15.8% capacity degradation after 3000consecutive cycles）.More meaningfully,the in-depth insights into the formation and charge-storage process here can promote the extensive development of binary metal Nb-based oxides for advanced LICs.

关键词： high-rate anodes lithium-ion capacitors lithium-storage mechanisms orthorhombic CuNb2O6 phase transform

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Additives to propylene carbonate-based electrolytes for lithium-ion capacitors

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Rare Metals 2022年第4期41卷 1304-1313页

作者： Peng-Lei Wang Xian-Zhong Sun Ya-Bin An Xiong Zhang Chang-Zhou Yuan Shuang-Hao Zheng Kai Wang Yan-Wei Ma Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu ZhongkeJinan 250013China School of Materials Science&Engineering University of JinanJinan 250022China State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China Dalian National Laboratory for Clean Energy Chinese Academy of SciencesDalian 116023China

Nowadays,lithium-ion capacitors(LICs) have become a type of important electrochemical energy storage devices due to their high power and long cycle life characteristics with fast response *** one of the essential components of LICs,the electrolytes not only provide the anions and cations required during charge and discharge processes,but also supply the liquid environment for ions to migrate between anodes and cathodes in LIC *** is well accepted that propylene carbonate(PC) cannot be used as a single solvent for Li-ion electrolyte due to the failure to form stable SEI film on graphite *** this work,the compatibility of PC-based electrolyte with commercial soft carbon anode and activated carbon cathode has been validated by using the laminated pouch LIC *** effects of additives on the electrochemical properties of PC-based LICs have been systematically *** sulfite(ES) was proved to be an effective additive to promote capacity retention at high C-rate,which is superior to vinylene carbonate and fluoroethylene *** addition of 5 wt% ES plays an important role in reducing internal resistance,as well as improving electrochemical stability and low-temperature *** study is expected to be beneficial to explore robust electrolyte/additive combinations for LICs to reduce the internal resistance and to improve the lowtemperature performances.

关键词： lithium-ion capacitors Propylene carbonate Li-ion electrolyte Ethylene sulfite Fluoroethylene carbonate lithium bis(fluorosulfonyl)imide

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Boosting High-Voltage Dynamics Towards High-Energy-Density lithium-ion capacitors

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Energy & Environmental Materials 2023年第4期6卷 211-217页

作者： Junfeng Huang Xin Lu Teng Sun Daiyao Yu Zhong Xu Yanting Xie Xinglin Jiang Yongbin Wang Shenglong Wang Xiong Zhang Weiqing Yang Haitao Zhang Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 610031China Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China

lithium-ion capacitors(LICs)are becoming important electrochemical energy storage systems due to their great potential to bridge the gap between supercapacitors and lithium-ion ***,capacity lopsidedness and low output voltage greatly hinder the realization of high-energy-density ***,a strategy of balancing capacity towards fastest dynamics is proposed to enable high-voltage *** electrochemical prelithiation of Nb_(2)C to be 1.1 V with 165 mAh g^(-1),Nb_(2)C//LiFePO_(4) LICs show a broadened potential window from 3.0 to 4.2 V and an according high energy density of 420 Wh kg^(-1).Moreover,the underlying mechanism between prelithiation and high voltage is disclosed by electrochemical dynamic *** declines the Nb_(2)C anode potential that facilitates electron transmission in the interlayer of two-dimensional Nb_(2)C *** effect induces small drive force for Li^(+)ions deposition and hence weakens the repulsive force from adsorbed ions on the electrode *** from even more Li^(+)ions deposition,a higher voltage is eventually *** addition,prelithiation significantly increases Coulomb efficiency of the 1st cycle from 74%to 90%,which is crucial to commercial application of LICs.

关键词： electrochemical dynamics high voltage lithium-ion capacitors Nb2C MXene prelithiation

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Nitrogen and phosphorous co-doped hierarchical meso–microporous carbon nanospheres with extraordinary lithium storage for highperformance lithium-ion capacitors

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Science China Materials 2022年第9期65卷 2363-2372页

作者： Tong Li Jianjun Zhang Chongxing Li Han Zhao Jing Zhang Zhao Qian Longwei Yin Rutao Wang Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of EducationSchool of Materials Science and EngineeringShandong UniversityJinan 250061China Shandong Key Laboratory for Special Silicon-containing Material Advanced Materials InstituteQilu University of Technology(Shandong Academy of Sciences)Jinan 250014China Suzhou Institute of Shandong University Suzhou 215123China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China

lithium-ion capacitors(LICs),consisting of a battery-like negative electrode and a capacitive porous-carbon positive electrode,deliver more than twice the energy density of electric double-layer ***,their wide application suffers from low energy density and reduced cycle life at high ***,hierarchical meso±microporous carbon nanospheres with a highly disordered structure and nitrogen/phosphorous co-doped properties were synthesized through a facile template *** hierarchical porous structure facilitates rapid ion transport,and the highly disordered structure and high heteroatom content provide abundant active sites for Li+charge *** experiments demonstrated that the carbon nanosphere anode delivers large reversible capability,greatly improves rate capability and exhibits excellent cycle *** LIC fabricated with the carbon nanosphere anode and an activated carbon cathode yields a high energy density of 103 W h kg^(-1),an extremely high power density of 44,630 W kg^(-1),and longterm cyclability of over 10,000 *** work presents how structural control of carbon materials at the nano/atomic scale can significantly enhance electrochemical performance,enabling new opportunities for the design of high-performance energy-storage devices.

关键词： lithium-ion capacitors porous carbon anode heteroatoms doping energy storage devices

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Mechanically flexible reduced graphene oxide/carbon composite films for high-performance quasi-solid-state lithium-ion capacitors

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Journal of Energy Chemistry 2023年第5期80卷 68-76,I0003页

作者： Wenjie Liu Yabin An Lei Wang Tao Hu Chen Li Yanan Xu Kai Wang Xianzhong Sun Haitao Zhang Xiong Zhang Yanwei Ma Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu ZhongkeJinan 250013ShandongChina Key Laboratory of Advanced Technologies of Materials Ministry of EducationSchool of Materials Science and EngineeringSouthwest Jiaotong UniversityChengdu 6003 SichuanChina School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001HenanChina

Practical applications of diverse flexible wearable electronics require electrochemical energy storage(EES)devices with multiple ***,to fabricate flexible EES devices with high energy density and stability,organic integration from electrode design to device assembly is *** address these challenges,a free-standing reduced graphene oxide(rGO)/carbon film with a unique sandwich structure has been designed via the assistance of vacuum-assistant filtration for lithium-ion capacitors(LICs).The graphene acts as not only a binder to construct a three-dimensional conductive network but also an active material to provide additional capacitive lithium storage sites,thus enabling fast ion/electron transport and improving the *** designed rGO/hard carbon(rGO/HC)and rGO/activated carbon(rGO/AC)free-standing films exhibit enhanced specific capacities(513.7 mA h g^(-1)for rGO/HC and 102.8 mA h g^(-1)for rGO/AC)and excellent ***,the integrated flexible quasi-solid-state rGO/AC//rGO/HC LIC devices possess a maximum energy density of 138.3 Wh kg^(-1),a high power density of 11 kW kg^(-1),and improved cycling performance(84.4%capacitance maintained after 10,000 cycles),superior to the AC//HC LIC(43.5%retention).Such a strategy enlightens the development of portable flexible LICs.

关键词： lithium-ion capacitors Free-standing films Reduced graphene oxide Carbon materials

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Dendrite-structured FeF_(2) consisting of closely linked nanoparticles as cathode for high-performance lithium-ion capacitors

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Journal of Energy Chemistry 2021年第4期30卷 517-523页

作者： Huanyu Liang Zhengqiang Hu Zhongchen Zhao Dong Chen Hao Zhang Huaizhi Wang Xia Wang Qiang Li Xiangxin Guo Hongsen Li College of Physics Center for Marine Observation and CommunicationsQingdao UniversityQingdao 266071ShandongChina

lithium-ion capacitors(LICs)are regarded as a good choice for next-generation energy storage devices,which are expected to exhibit high energy densities,high power densities,and ultra-long cycling ***,only a few battery-type cathode materials with limited kinetic properties can be employed in LICs,and their electrochemical properties need to be optimized ***,we exploit a new dendrite-structured FeF_(2) consisting of closely linked primary nanoparticles using a facile solvothermal method combined with the subsequent annealing *** particular architecture has favorable transport pathways for both lithium ions and electrons and exhibits an ultrafast chargedischarge capability with high reversible ***,a well-designed LIC employing the prepared dendrite-structured FeF_(2) as the battery-type cathode and commercialized activated carbon(AC)as supercapacitor-type anode was constructed in an organic electrolyte containing Li *** LIC operates at an optimal voltage range of 1.1-3.8 V and shows a maximum high energy density of 152 W h kg^(-1) and a high power density of 4900 W kg^(-1) based on the total mass of cathode and ***-term cycling stability(85%capacity retention after 2000 cycles)was achieved at 1 A g^(-1).This work suggests that the dendrite-structured FeF_(2) is a prime candidate for high-performance LICs and accelerates the development of hybrid ion capacitor devices.

关键词： Dendrite-structured FeF_(2) Cathode materials lithium-ion capacitors High energy densities

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Carbon-doped surface unsaturated sulfur enriched CoS2@rGO aerogel pseudocapacitive anode and biomass-derived porous carbon cathode for advanced lithium-ion capacitors

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Frontiers of Chemical Science and Engineering 2021年第6期15卷 1500-1513页

作者： Yunpeng Shang Xiaohong Sun Zhe Chen Kunzhou Xiong Yunmei Zhou Shu Cai Chunming Zheng School of Materials Science and Engineering Key Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin300072China School of Chemistry and Chemical Engineering State Key Laboratory of Hollow Fiber Membrane Materials and Membrane ProcessesTiangong UniversityTianjin300387China

As a hybrid energy storage device of lithium-ion batteries and supercapacitors,lithium-ion capacitors have the potential to meet the demanding needs of energy storage equipment with both high power and energy *** this work,to solve the obstacle to the application of lithium-ion capacitors,that is,the balancing problem of the electrodes kinetic and capacity,two electrodes are designed and adequately *** the anode,we introduced in situ carbon-doped and surface-enriched unsaturated sulfur into the graphene conductive network to prepare transition metal sulfides,which enhances the performance with a faster lithium-ion diffusion and dominant pseudocapacitive energy ***,the lithium-ion capacitors anode material delivers a remarkable capacity of 810 mAh·g^(−1) after 500 cycles at 1 A·g^(−1).On the other hand,the biomass-derived porous carbon as the cathode also displays a superior capacity of 114.2 mAh·g^(−1) at 0.1 A·g^(−1).Benefitting from the appropriate balance of kinetic and capacity between two electrodes,the lithium-ion capacitors exhibits superior electrochemical *** assembled lithium-ion capacitors demonstrate a high energy density of 132.9 Wh·kg^(−1) at the power density of 265 W·kg^(−1),and 50.0 Wh·kg^(−1) even at 26.5 kW·kg^(−1).After 10000 cycles at 1 A·g^(−1),lithium-ion capacitors still demonstrate the high energy density retention of 81.5%.

关键词： in-situ carbon-doped surface unsaturated sulfur enriched pseudocapacitive energy storage biomass-derived carbon lithium-ion capacitors

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Ultrathin porous graphitic carbon nanosheets activated by alkali metal salts for high power density lithium-ion capacitors

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Rare Metals 2020年第12期39卷 1364-1373页

作者： Yu-Qing Dai Guang-Chao Li Xin-Hai Li Hua-Jun Guo Zhi-Xing Wang Guo-Chun Yan Jie-Xi Wang School of Metallurgy and Environment&College of Chemistry and Chemical Engineering Central South UniversityChangsha410083China Engineering Research Center of the Ministry of Education for Advanced Battery Materials School of Metallurgy and Environment&College of Chemistry and Chemical EngineeringChangsha410083China

Graphitic carbons with reasonable pore volume and appropriate graphitization degree can provide efficient Li+/electrolyte-transfer channels and ameliorate the sluggish dynamic behavior of battery-type carbon negative electrode in lithium-ion capacitors(LICs).In this work,onion-like graphitic carbon materials are obtained by using carbon quantum dots as precursors after sintering,and the effects of alkali metal salts on the structure,morphology and performance of the samples are *** results show that alkali metal salts as activator can etch graphitic carbons,and the specific surface area and pore size distribution are intimately related to the description of the alkali metal ***,it also affects the graphitization degree of the *** porous graphitic carbons(SGCs)obtained by NaCl activation exhibit high specific surface area(77.14 m^(2)·g^(-1))and appropriate graphitization *** is expectable that the electrochemical performance for lithium-ions storage can be largely promoted by the smart combination of catalytic graphitization and pores-creating ***-performance LICs(S-GCs//AC LICs)are achieved with high energy density of 92 Wh·kg^(-1)and superior rate capability(66.3 Wh·kg^(-1)at10 A·g^(-1))together with the power density as high as10020.2 W·kg^(-1).

关键词： Alkali metal salts activation Porous graphitic carbons Catalytic graphitization lithium-ion capacitors

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Carbon-coated Li3VO4 with optimized structure as high capacity anode material for lithium-ion capacitors

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Chinese Chemical Letters 2020年第9期31卷 2225-2229页

作者： Wenjie Liu Xiong Zhang Chen Li Kai Wang Xianzhong Sun Yanwei Ma Institute of Electrical Engineering Chinese Academy of SciencesBeijing 100190China School of Engineering Sciences University of Chinese Academy of SciencesBeijing 100049China Dalian National Laboratory for Clean Energy Dalian 116023China

Due to the high capacity,moderate voltage platform,and stable structure,Li3VO4(LVO) has attracted close attention as feasible anode material for lithium-ion ***,the intrinsic low electronic conductivity and sluggish kinetics of the Li+ insertion process severely impede its practical application in lithium-ion capacitors(LICs).Herein,a carbon-coated Li3VO4(LVO/C) hierarchical structure was prepared by a facial one-step solid-state *** synthesized LVO/C composite delivers an impressive capacity of 435 mAh/g at 0.07 A/g,remarkable rate capability,and nearly 100% capacity retention after 500 cycles at 0.5 A/*** superior electrochemical properties of LVO/C composite materials are attributed to the improved conductivity of electron and stable carbon/LVO composite ***,the LIC device based on activated carbon(AC) cathode and optimal LVO/C as anode reveals a maximum energy density of 110 Wh/kg and long-term cycle *** results provide a potential way for assembling the advanced hybrid lithium-ion capacitors.

关键词： Carbon-coated Li3VO4 lithium-ion capacitors Anode material Capacity matching

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