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high energy density in ultra-thick and flexible electrodes enabled by designed conductive agent/binder composite

Journal of energy Chemistry 2024年第3期90卷 133-143,I0005页

作者： Xiaoyu Shen Hailong Yu Liubin Ben Wenwu Zhao Qiyu Wang Guanjun Cen Ronghan Qiao Yida Wu Xuejie Huang Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808Guangdong China

Thick electrodes can increase incorporation of active electrode materials by diminishing the proportion of inactive constituents,improving the overall energy density of ***,thick electrodes fabricated using the conventional slurry casting approach frequently exhibit an exacerbated accumulation of carbon additives and binders on their surfaces,invariably leading to compromised electrochemical *** this study,we introduce a designed conductive agent/binder composite synthesized from carbon nanotube and *** agent/binder composite facilitates production of dry-process-prepared ultra-thick electrodes endowed with a three-dimensional and uniformly distributed percolative architecture,ensuring superior electronic conductivity and remarkable mechanical *** this approach,ultra-thick LiCoO_(2)(LCO) electrodes demonstrated superior cycling performance and rate capabilities,registering an impressive loading capacity of up to 101.4 mg/cm^(2),signifying a 242% increase in battery energy *** another analytical endeavor,time-of-flight secondary ion mass spectroscopy was used to clarify the distribution of cathode electrolyte interphase(CEI) in cycled LCO *** results provide unprecedented evidence explaining the intricate correlation between CEI generation and carbon distribution,highlighting the intrinsic advantages of the proposed dry-process approach in fine-tu ning the CEI,with excellent cycling performance in batteries equipped with ultra-thick electrodes.

关键词： Conductive agent/binder composite Dry process Ultra-thick electrodes high energy density CEI reconstruction ToF-SIMS

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A high-entropy-designed cathode with V5+-V2+ multi-redox for high energy density sodium-ion batteries

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Journal of energy Chemistry 2024年第10期97卷 429-437页

作者： Xiang Ding Xiaofen Yang Yibing Yang Liangwei Liu Yi Xiao Lili Han College of Chemistry and Materials Science Fujian Normal University State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences

Na3V2（PO4）3（NVP） is gifted with fast Na+conductive NASICON *** it still suffers from low electronic conductivity and inadequate energy ***,a high-entropy modification strategy is realized by doping V3+site with Ga3+/Cr3+/Al3+/Fe3+/In3+simultaneously(***3V2-x（GaCrAlFeIn）x（PO4）3;x=0,0.04,0.06,and 0.08) to stimulate the V5+■V2+reversible multi-electron *** configuration high-entropy can effectively suppress the structural collapse,enhance the redox reversibility in high working voltage（4.0 V）,and optimize the electronic induced *** in-situ X-ray powder diffraction and in-situ electrochemical impedance spectroscopy tests efficaciously confirm the robust structu ral recovery and far lower polarization throughout an entire charge-discharge cycle during 1.6-4.3 V,***,the density functional theory calculations clarify the stronger metallicity of high-entropy electrode than the bare that is derived from the more mobile free electrons surrounding the vicinity of Fermi *** grace of high-entropy design and multi-electron transfer reactions,the optimal Na3V1.7（GaCrAlFeIn）0.06（PO4）3can exhibit perfect cycling/rate performances(90.97%@5000 cycles@30 C;112 mA h g-1@10 C and 109 mA h g-1@30 C,2.0-4.3 V).Furthermore,it can supply ultra-high185 mA h g-1capacity with fa ntastic energy density(522 W h kg-1) in half-cells（1.4-4.3 V）,and competitive capacity(121 mA h g-1) as well as energy density(402 W h kg-1) in full-cells（1.6-4.1 V）,demonstrating enormous application potential for sodium-ion batteries.

关键词： high energy density high-entropy Na3V2(PO4)3 Sodium-ion batteries V5+⇋V2+ multi-redox

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Particle Size Optimization of Thermochemical Salt Hydrates for high energy density Thermal Storage

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energy & Environmental Materials 2024年第2期7卷 330-337页

作者： Andrew Martin Drew Lilley Raνi Prasher Sumanjeet Kaur energy Technologies Area Lawrence Berkeley National Laboratory Department of Mechanical Engineering UC Berkeley

Thermal energy storage（TES） solutions offer opportunities to reduce energy consumption, greenhouse gas emissions, and cost. Specifically, they can help reduce the peak load and address the intermittency of renewable energy sources by time shifting the load, which are critical toward zero energy buildings. Thermochemical materials（TCMs） as a class of TES undergo a solid–gas reversible chemical reaction with water vapor to store and release energy with high storage capacities(600 k Wh m-3) and negligible selfdischarge that makes them uniquely suited as compact, stand-alone units for daily or seasonal storage. However, TCMs suffer from instabilities at the material（salt particles） and reactor level（packed beds of salt）, resulting in poor multi-cycle efficiency and high-levelized cost of storage. In this study, a model is developed to predict the pulverization limit or Rcritof various salt hydrates during thermal cycling. This is critical as it provides design rules to make mechanically stable TCM composites as well as enables the use of more energy-efficient manufacturing process（solid-state mixing） to make the composites. The model is experimentally validated on multiple TCM salt hydrates with different water content, and effect of Rcriton hydration and dehydration kinetics is also investigated.

关键词： high energy density hydration kinetics long-term cycling thermal energy storage thermochemical materials

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Fluorophosphates and fluorosulfates cathode materials: Progress towards high energy density sodium-ion battery

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Nano Research 2024年第3期17卷 1427-1440页

作者： Mohammed Hadouchi Jingrong Hou Toshinari Koketsu Abdelilah Lahmar Jiwei Ma Laboratoire de Chimie Appliquée des Matériaux Centre des Sciences des MatériauxFaculty of ScienceMohammed V University in RabatAvenue Ibn BattoutaBP 1014RabatMorocco Shanghai Key Laboratory for R&D and Application of Metallic Functional Materials Institute of New Energy for VehiclesSchool of Materials Science and EngineeringTongji UniversityShanghai 201804China Battery Materials Development Section Business Creation Sector R&D CenterMitsui Mining&Smelting Co.Ltd.362-0021 SaitamaJapan Laboratoiry of Condensed Matter Physics University of Picardie Jules Verne33 Rue Saint-Leu 80039AmiensFrance

The rapid diffusion of renewable energy boosts the wide deployment of large-scale energy storage *** the low cost and high crustal abundance,sodium-ion battery(SIB)technology is expected to become a dominant technology in that area in the *** the practical application,novel cathode materials are urged to develop that show high energy density without sacrificing their cost and benignity to the *** the years of many studies,this still remains a huge challenge to battery *** this review,we discuss recent breakthroughs in SIB cathode materials with high energy density,namely fluorphosphates and *** design of materials,the crystal structure,the electrochemical performance,and the underlaying intercalation mechanism are systematically *** strategies and research directions are also provided to advance future high-energy,low-cost,and ecofriendly cathode materials for next generation SIB.

关键词： fluorophosphates fluorosulfates crystal structure intercalation mechanism high energy density sodium-ion battery

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3D printing encouraging desired in-situ polypyrrole seed-polymerization for ultra-high energy density supercapacitors

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Journal of energy Chemistry 2024年第8期95卷 117-125,I0004页

作者： Tiantian Zhou Shangwen Ling Shuxian Sun Ruoxin Yuan Ziqin Wu Mengyuan Fu Hanna He Xiaolong Li Chuhong Zhang State Key Laboratory of Polymer Materials Engineering Polymer Research InstituteSichuan UniversityChengdu 610065SichuanChina

The tireless pursuit of supercapacitors with high energy density entails the parallel advancement of wellsuited electrode materials and elaborately engineered ***(PPy)emerges as an exceedingly conductive polymer and a prospective pseudocapacitive materials for supercapacitors,yet the inferior cyclic stability and unpredictable polymerization patterns severely impede its real-world ***,for the first time,an innovative seed-induced in-situ polymerization assisted 3D printing strategy is proposed to fabricate PPy-reduced graphene oxide/poly(vinylidene difluoride-cohexafluoropropylene)(PVDF-HFP)(PPy-rGO/PH)electrodes with controllable polymerization behavior and exceptional areal mass *** preferred active sites uniformly pre-planted on the 3D-printed graphene substrates serve as reliable seeds to induce efficient polypyrrole deposition,achieving an impressive mass loading of 185.6 mg cm^(-2)(particularly 79.2 mg cm^(-2)for polypyrrole)and a superior areal capacitance of 25.2 F cm^(-2)at 2 mA cm^(-2)for a 12-layer *** agreement with theses appealing features,an unprecedented areal energy density of 1.47 mW h cm^(-2)for a symmetrical device is registered,a rarely achieved value for other PPy/rGO-based *** work highlights a promising route to preparing high energy density energy storage modules for real-world applications.

关键词： 3D printing Seed-induced polymerization Supercapacitor Polypyrrole high energy density

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"Win-Win" Scenario of high energy density and Long Cycling Life in a Novel Na3.9MnCr0.9Zr0.1（PO4）3 Cathode

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energy & Environmental Materials 2024年第1期7卷 87-94页

作者： Yao Wang Yukun Liu Pingge He Junteng Jin Xudong Zhao Qiuyu Shen Jie Li Xuanhui Qu Yongchang Liu Lifang Jiao Beijing Advanced Innovation Center for Materials Genome Engineering State Key Laboratory for Advanced Metals and Materials Institute for Advanced Materials and Technology University of Science and Technology Beijing Department of Chemistry and Biochemistry University of California Tianjin Key Laboratory for Photoelectric Materials and Devices School of Materials Science and Engineering Tianjin University of Technology Key Laboratory of Advanced energy Materials Chemistry (Ministry of Education) Nankai University

The development of high-energy and long-lifespan NASICON-type cathode materials for sodium-ion batteries has always been a research hotspot but a daunting *** Na4MnCr（PO4）3has emerged as one of the most promising high-energy-density cathode materials owing to its threeelectron reactions,it still suffers from serious structural distortion upon repetitive charge/discharge processes caused by the Jahn-Teller active Mn3+.

关键词： high energy density mechanism investigation NASICON-type cathodes sodium-ion batteries structure modification

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An empirical model for high energy density lithium-(ion)batteries with ultra-thick electrodes

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Tungsten 2024年第1期6卷 230-237页

作者： Li-Ming Jin Guang-Guang Xing Nan Qin Yan-Yan Lu Jun-Sheng Zheng Cun-Man Zhang Jim P.Zheng School of Automotive Studies and Clean energy Automotive Engineering Center Tongji UniversityShanghai 201804China Department of Electrical Engineering University at BuffaloThe State University of New YorkBuffaloNY 14260USA

Increasing the electrode thickness is a significant method to decrease the weight and volume ratio of the inactive components for high energy density of the *** this contribution,we extracted a repeating unit in the configurations and establish the empirical energy density model based on some *** this model,the effects of the electrode thickness on the energy density for lithium-ion batteries(LIBs),lithium metal batteries(LMBs),and anode-free lithium batteries(ALBs)are evaluated quantitively with the current parameters of the *** results demonstrate that the structure evolutions from LIBs,LMBs to ALBs with the reduction of the anode weight contribution,the energy density can be well improved *** the increase of the thickness of the electrode provide another route to furthe r enhance the energydensity by decreasing the weight contribution of inactive materials;meanwhile the effects for ALBs are higher than LMBs and LIBs due to the higher weight ratio of inactive *** empirical energy density model is also applied into the practical system and provide intuitional results to guide the battery design for higher energy density.

关键词： Empirical model high energy density Lithium batteries Ultra-thick electrodes

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Novel layered K0.7Mn0.7Ni0.3O2 cathode material with enlarged diffusion channels for high energy density sodium-ion batteries

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Science China Materials 2020年第7期63卷 1163-1170页

作者： Jinghui Chen Zhitong Xiao Jiashen Meng Jinzhi Sheng Yanan Xu Junjun Wang Chunhua Han Liqiang Mai State Key Laboratory of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

As promising,low-cost alternatives of lithiumion batteries for large-scale electric energy storage,sodiumion batteries(SIBs)have been studied by many ***,the relatively large size of Na+leads to sluggish diffusion kinetics and poor cycling stability in most cathode materials,restricting their further *** this work,we demonstrated a novel K+-intercalated Mn/Ni-based layered oxide material(K0.7Mn0.7Ni0.3O2,denoted as KMNO)with stabilized and enlarged diffusion channels for high energy density SIBs.A spontaneous ion exchange behavior in forming K0.1Na0.7Mn0.7Ni0.3O2between the KMNO electrode and the sodium ion electrolyte was clearly revealed by in situ X-ray diffraction and ex situ inductively coupled plasma *** interlayer space varied from 6.90 to 5.76?,larger than that of Na0.7Mn0.7Ni0.3O2(5.63?).The enlarged ionic diffusion channels can effectively increase the ionic diffusion coefficient and simultaneously provide more K+storage sites in the product *** a proof-of-concept application,the SIBs with the as-prepared KMNO as a cathode display a high reversible discharge capacity(161.8 mA h g-1at0.1 A g-1),high energy density(459 W h kg-1)and superior rate capability of 71.1 mA h g-1at 5 A *** work demonstrates that the K+pre-intercalation strategy endows the layered metal oxides with excellent sodium storage performance,which provides new directions for the design of cathode materials for various batteries.

关键词： K0.7Mn0.7Ni0.3O2 K^+pre-intercalation enlarged layered structure high energy density sodium-ion batteries

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A high energy density Self-supported and Bendable Organic Electrode for Redox Supercapacitors with a Wide Voltage Window

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Chinese Journal of Polymer Science 2020年第5期38卷 522-530,I0007页

作者： Rashid lqbal Aziz Ahmad Li-Juan Mao Zahid Ali Ghazi Abolhassan Imani Chun-Xiang Lu Li-Jing Xie Saad Melhi Fang-Yuan Su Cheng-Meng Chen Lin-Jie Zhi Zhi-Xiang Wei Chinese Academy of Sciences(CAS)Key Laboratory of Nanosystem and Hierarchical Fabrication National Center for Nanoscience and TechnologyBeijing 100190China CAS Key Laboratory of Carbon Materials Institute of Coal ChemistryChinese Academy of SciencesTaiyuan 030001China University of Chinese Academy of Sciences Beijing 100049China Department of Chemistry College of ScienceUniversity ofBishaBisha 61922Saudi Arabia

Redox-active organic electrode materials are highly desirable in realizing next-generation all-in-one bendable electronic ***,a novel flexible supercapacitors(SCs)electrode is fabricated from poly(anthraquinonyl sulfide)(PAQS)and single-walled carbon nanotubes(SWCNTs)suspension by a simple vacuum filtration and named as *** PAQS-SWCNTs electrode offered an initial capacitance of 223 F·g^-1 and outstanding capacitance retention up to 78.4%after 3×10^4 charge-discharge cycles at 0.5 A·g^-1 current *** a high potential range(0-3 V)and aprotic electrolyte,the PAQS-SWCNTs electrodes in coin cell exhibited an outstanding energy density of 69 Wh·kg^-1 at a power density of 90.6 W·kg^-1,whereas in the fabricated flexible SCs it retained 63.2 Wh·kg^-*** PAQS-SWCNTs electrodes also showed extraordinary performance at a higher current density(20 A·g^-1)and maintained a specific capacitance of 55 and 47 F·g^-1 for coin and flexible SCs,***,the flexible SC is further verified to be able to illuminate up multiple *** futuristic findings showed that the SCs assembled with flexible PAQS-SWCNTs electrodes have potential application in energy-storage devices and make them highly appealing for future redox supercapacitors.

关键词： Redox-active high energy density PAQS SWCNTs Flexible SCs

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Dual carbon Li-ion capacitor with high energy density and ultralong cycling life at a wide voltage window

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Science China Materials 2022年第9期65卷 2373-2384页

作者： Zhijian Qiu Yongpeng Cui Dandan Wang Yesheng Wang Haoyu Hu Xuejin Li Tonghui Cai Xiuli Gao Han Hu Mingbo Wu Qingzhong Xue Zifeng Yan Wei Xing State Key Laboratory of Heavy Oil Processing School of Material Science and EngineeringCollege of ScienceChina University of PetroleumQingdao 266580China

Using the same materials for the cathode and anode in energy storage devices could greatly simplify the technological process and reduce the device cost *** this paper,we assemble a dual carbon-based Li-ion capacitor with the active materials derived entirely from a single precursor,petroleum *** the anode,petroleum cokederived carbon(PCC)is prepared by simple ball milling and carbonization,having a massive tap density(1.80 g cm^(-3))and high electrical conductivity(11.5 S cm^(-1)).For the cathode,the raw petroleum coke is activated by KOH(petroleum cokeactivated carbon(PC-AC)sample)to achieve a well-developed pore structure to meet a rapid capacitive *** a result,in addition to the robust structural stability of both the anode and cathode,the assembled dual carbon Li-ion capacitor shows a high energy density(231 W h kg^(-1)/206 W h L^(-1))and ultralong cycling life(up to 3000/10,000 cycles)at a wide voltage *** excellent electrochemical response and simple production process make the PCC materials have great potential for practical application.

关键词： Li-ion capacitor dual carbon electrode high energy density wide voltage window petroleum coke

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