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Mechano-electrochemical perspectives on flexible lithium-ion batteries

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International Journal of Minerals,Metallurgy and Materials 2022年第5期29卷 1019-1036页

作者： Na Li Shuangquan Yang haosen chen Shuqiang Jiao Weili Song Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

With the advent of flexible/wearable electronic devices,flexible lithium-ion batteries(LIBs)have attracted significant attention as optimal power source *** LIBs with good flexibility,mechanical stability,and high energy density are still an enormous *** recent years,many complex and diverse design methods for flexible LIBs have been *** design and evaluation of ideal flexible LIBs must take into consideration both mechanical and electrochemical *** this review,the recent progress and challenges of flexible LIBs are reviewed from a mechano-electrochemical *** recent progress in flexible LIB design is addressed concerning flexible material and configuration *** mechanical and electrochemical evaluations of flexible LIBs are also ***,mechano-electrochemical perspectives for the future direction of flexible LIBs are also ***,the relationship between mechanical loading and the electrode process is analyzed from a mechano-electrochemical *** evaluation of flexible LIBs should be based on mechano-electrochemical *** and perspectives are of great significance to the design and practicality of flexible LIBs,which is contributed to bridging the gap between laboratory exploration and practical applications.

关键词： flexible lithium-ion batteries flexible materials structural design mechanical and electrochemical coupling

Thickness evolution of commercial Li-ion pouch cells with siliconbased composite anodes and NCA cathodes

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Science China(Technological Sciences) 2021年第1期64卷 83-90页

作者： ZHANG XingYu HE Jie ZHOU Jiang chen haosen SONG WeiLi FANG DaiNing State Key Laboratory of Mechanics and Control of Mechanical Structures College of Aerospace EngineeringNanjing University of Aeronautics and AstronauticsNanjing 210016China State Key Laboratory of Explosion Science and Technology Institute of Advanced Structure TechnologyBeijing Institute of TechnologyBeijing 100081China Lishen Research Institute Tianjin Lishen Battery Joint-stock Co.Ltd.Tianjin 300384China State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking UniversityBeijing 100871China

It is significant to monitor the thickness change of commercial Li-ion pouch cells that are assembled from Si-based electrodes and layered cathodes since the volume variation is critically linked with kinetic reaction mechanism and chemomechanical degradation. In this work, the single-point and full-field measurements are conducted on the thickness evolution of Si Ox/Cgraphite/lithium nickel-cobalt-aluminum oxide(Si Ox-G/NCA) batteries. It is found that an abnormal overshoot that has been rarely observed in the previous studies appears at the beginning of discharge, which is believed to be the combined results between the rapid expansion of NCA and the contraction of graphite related to the state of charge(SOC). Compared with the results of single-point measurement, the spatial displacement distribution obtained from three-dimensional(3D) scanning suggests the full-field thickness evolution of the entire cell scale, which is more feasible and efficient to provide full-field information for supporting pouch cell design and pack integration.

关键词： thickness change 3D scanning silicon-based anode NCA cathode lithium-ion battery

Multi-field coupled color-changing devices and structures

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Science China(Technological Sciences) 2019年第6期62卷 1065-1066页

作者： BAO YinHua HAN Yu SONG WeiLi chen haosen FANG DaiNing State Key Laboratory for Turbulence and Complex System College of Engineering Peking University Beijing 100871 China Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China

Multi-field coupling phenomenon plays a significant role in the design and fabrication of color-changing devices. By introducing external fields, such as strain/stress, electric, thermal, or chemical fields, these dev... 详细信息

关键词： Multi-field plays a significant optical tunability

Electrochemically triggered decoupled transport behaviors in intercalated graphite:From energy storage to enhanced electromagnetic applications

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International Journal of Minerals,Metallurgy and Materials 2023年第1期30卷 33-43页

作者： Ya chen Kailun Zhang Na Li Wei Guan Zhiyuan Li haosen chen Shuqiang Jiao Weili Song Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

Pyrolytic graphite (PG) with highly aligned graphene layers,present anisotropic electrical and thermal transport behavior,which is attractive in electronic,electrocatalyst and energy *** pristine PG could meeting the limit of electrical conductivity (~2.5×10^(4) S·cm^(−1)),although efforts have been made for achieving high-purity sp^(2) hybridized *** manipulating the electrical conductivity of PG,a facile and efficient electrochemical strategy is demonstrated to enhance electrical transport ability via reversible intercalation/de-intercalation of AlCl_(4)^(-)into the graphitic *** the stage evolution at different voltages,variable electrical and thermal transport behaviors could be achieved via controlling AlCl_(4)^(-)concentrations in the PG because of substantial variation in the electronic density of *** evolution leads to decoupled electrical and thermal transport (opposite variation trend) in the in-plane and out-of-plane directions,and the in-plane electrical conductivity of the pristine PG (1.25×10^(4) S·cm^(−1)) could be massively promoted to 4.09×10^(4) S·cm(AlCl_(4)^(-)intercalated PG),much better than the pristine bulk graphitic papers used for the electrical transport and electromagnetic *** fundamental mechanism of decoupled transport feature and electrochemical strategy here could be extended into other anisotropic conductive bulks for achieving unusual behaviors.

关键词： electrochemically manipulatable aluminum battery graphite intercalation compounds transport behavior electromagnetic interference shielding

Rapid operando gas monitor for commercial lithium ion batteries: Gas evolution and relation with electrode materials

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Journal of Energy Chemistry 2022年第9期31卷 14-25,I0002页

作者： Siqi Lyu Na Li Lei Sun Shuqiang Jiao haosen chen Wei-Li Song Institute of Advanced Structure Technology.Bejing Institute of Technology.Bejing 100081 China School ofifomation and Eletronics Beijing nstute of Technology.Bejing 100081China StateKey Laboratory of Advanced Metalurgy University of Science and Technology Bejing Bejing 100083China

Internal gases caused by side reactions are crucial signals for evaluating health and safety states of Li-ion batteries(LIBs)while it is still a great challenge to timely realize accurate *** address the issues of implanting various gas sensors into commercial batteries,here a novel method is developed to fast operando monitoring gas evolution via equipping non-dispersive infrared multi-gases sensors into a sealed tank,where real commercial batteries with one open end could be settled for *** generated CO_(2)concentration is strongly linked with both voltage and temperature,while the concentrations of CH_(4) and C_(2)H_(4) are solely dependent on *** a typical trace gas,evolution behaviors of CO_(2)have been related to 0_(2) generation from LiNi_(o.5)Mn_(0.3)CoO_(2)0_(2) positive electrode,implying stable CO_(2)release below a critical voltage of 4.5 *** tracking CO_(2)concentration,an increased amount of Li_(2)CO_(3) was monitored on the surface of graphite negative electrode during discharge process at dfferent temperatures and cutoff voltages,which contributes to the component variation of solid electrolyte *** operando techniques promise a plaform for well understanding the interaction of side reactions linked with gas evolution between positive and negative electrodes in commercial LIBs.

关键词： Operando monitoring CO_(2)evolution Fast response Li-ion batteries

All-carbon positive electrodes for stable aluminium batteries

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Journal of Energy Chemistry 2020年第3期29卷 17-26页

作者： Zhili Zhou Na Li Peng Wang Wei-Li Song Shuqiang Jiao haosen chen Daining Fang Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing Institute of TechnologyBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking UniversityBeijing 100871China

For addressing the critical problems in current collectors in the aluminium batteries,a variety of carbonbased current collectors,including carbon fiber textiles and three-dimensional(3D)biomass-derivative carbon(BDC)networks,are employed for serving as lightweight non-metal current *** results indicate that all the carbon-based current collectors have electrochemical stability in the acidic electrolyte *** the assembled aluminium batteries with all-carbon positive electrodes,thermal annealing process on the carbon-based current collectors has substantially promoted the entire electrochemical energy storage ***,both the structure configuration and chemical components of the current collectors have also great impact on the rate capability and cycling stability,implying that the 3D BDC networks are more favorable to offer promoted energy storage *** of the results from suggests that the carbon-based current collectors and all-carbon positive electrodes are able to deliver more advantages in energy storage behaviors in comparison with the traditional positive electrodes with metal Mo current *** novel strategy promises a new route for fabricating highperformance positive electrodes for stable advanced aluminium batteries.

关键词： Carbon fiber Graphite Current collectors All-carbon electrode Al batteries

Stable wide-temperature and low volume expansion Al batteries:Integrating few-layer graphene with multifunctional cobalt boride nanocluster as positive electrode

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Nano Research 2020年第2期13卷 419-429页

作者： Li-Li chen Na Li Huifeng Shi Yuefei Zhang Wei-Li Song Shuqiang Jiao haosen chen Daining Fang Institute of Advanced Structure Technology Beijing Institute of TechnologyBeijing 100081China Beijing Key Laboratory of Lightweight Multi-functional Composite Materials and Structures Beijing Institute of TechnologyBeijing 100081China School of Materials Science&Engineering Beijing Institute of TechnologBeijing 100081China State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China Institute of Microstructure and Property of Advarced Materials Beijing University of TechnologyBejing 100124China State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking UniversityBeijing 100871China

To achieve stable positive electrode for promoting the overall electrochemical performance of Al batteries(ABs),here novel cobalt boride(CoB)nanoclusters are synthesized to construct composite electrodes with few-layer graphene(FLG).Due to the presence of amorphous channels in the employed CoB nanoclusters,the ABs with FLG/CoB composite positive electrodes exhibit high *** and both mechanical and electrochemical stability in the *** assistance of in situ scanning electron microscopy(SEM),the observation results suggest that the positive electrode of CoB nanoclusters holds almost ignorable volume variation upon electrochemical processes,which substantially alleviates the massive electrode expansion induced by the anion intercalation in the composite positive ***,the composite positive electrodes provide stable reversible energy storage capability within a broadened temperature range(-30-60℃),promising a novel strategy to design advanced ABs positive electrodes with enhanced overall energy storage performance.

关键词： Al batteries positive electrode cobalt boride nanoclusters ionic liquid broad temperature

Electrochemomechanical coupled behaviors of deformation and failure in electrode materials for lithium-ion batteries

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Science China(Technological Sciences) 2019年第8期62卷 1277-1296页

作者： LIANG HuanZi ZHANG XingYu YANG Le WU YiKun chen haosen SONG WeiLi FANG DaiNing State Key Laboratory of Explosion Science and Technology Institute of Advanced Structure Technology Beijing Institute of Technology Beijing 100081 China State Key Laboratory of Mechanics and Control of Mechanical Structures Interdisciplinary Research Institute of Aeronautics and Astronautics College of Aerospace Engineering Nanjing University of Aeronautics and Astronautics Nanjing 210016 China State Key Laboratory for Turbulence and Complex Systems College of Engineering Peking University Beijing 100871 China

The growing demands of lithium-ion batteries with high energy density motivate the development of high-capacity electrode materials. The critical issue in the commercial application of these electrodes is electrochemomechanical degradation accompanied with the large volume change, built-in stress, and fracture during lithiation and delithiation. The strong and complex couplings between mechanics and electrochemistry have been extensively studied in recent years. The multi-directional couplings, e.g.,(de)lithiation-induced effects and stress-regulated effects, require cooperation in the interdisciplinary fields and advance the theoretical and computational models. In this review, we focus on the recent work with topics in the electrochemomechanical couplings of deformation and fracture of conventional and alloying electrodes through experimental characterization, theoretical and computational models. Based on the point of view from mechanics, the strategies for alleviating the degradation are also discussed, with particular perspectives for component-interaction patterns in the composite electrodes. With interdisciplinary principles, comprehensive understanding of the electrochemomechanical coupled mechanism is expected to provide feasible solutions for low-cost, high-capacity, high-safety and durable electrodes for lithium-ion batteries.

关键词： electrochemomechanical coupling deformation theory fracture electrode materials lithium-ion battery

Thickness evolution of graphite-based cathodes in the dual ion batteries via in operando optical observation

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Journal of Energy Chemistry 2019年第2期28卷 122-128页

作者： Na Li Yaoda Xin haosen chen Shuqiang Jiao Hanqing Jiang Wei-Li Song Daining Fang Institute of Advanced Structure Technology Beijing Institute of Technology Beijing Key Laboratory of Lightweight Multi-Functional Composite Materials and Structures Beijing Institute of Technology Overseas Education College Nanjing University of Technology Collaborative Innovation Center of Electric Vehicles in Beijing Beijing Institute of Technology State Key Laboratory of Advanced Metallurgy University of Science and Technology Beijing School for Engineering of Matter Transport and EnergyArizona State University State Key Laboratory for Turbulence and Complex Systems College of EngineeringPeking University

Graphite has been currently considered as a promising cathode material in dual ion batteries(DIBs)due to its unique features of sp2 hybridized carbon and stacked two-dimensional layered ***,unexpected volume/thickness changes in the graphite cathodes,induced by the intercalation/deintercalation of anions with large molecular size have been known to be a critical problem in designing DIB *** understand the volume/thickness changes in the DIB electrodes,in operando optical observing apparatus has been employed to observe the cross-section view of a graphite-based cathode upon cycles in the present *** observation suggests that the cathode initially presented a huge irreversible thickness change(60%),and such thickness variation was prone to reduce and remain <20% in the following *** results from both in operando observation and electrochemical characterizations collectively indicate that the greater thickness variation at initial cycle should be attributed to both anion intercalation into graphite-based cathodes and irreversible decomposition of chemical components in the DIB *** method here highlights a universal route for fundamentally understanding the electrodes of huge volume variation.

关键词： Dual ion batteries In operando optical observation Graphite Cathode Thickness evolution