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Toward better electrode/electrolyte interfaces in the ionic-liquid-based rechargeable aluminum batteries

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Journal of Energy Chemistry 2020年第6期29卷 98-102,I0004页

作者： haoyi yang Feng Wu Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering and School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

The past decade has witnessed the germination of rechargeable aluminum batteries(RABs)with the colossal potential to enact as a device for the large scale energy storage and *** Majority of investigations are dedicated to the exploration of suitable cathode materials,while less is known about the electrode/electrolyte interfaces that determine the electrochemistry of *** this perspective,we will highlight the significance of electrode/electrolyte interface for RABs,in overall kinetics and capacity *** will be laid on the complicated yet basic understandings of the phenomena at the interfaces,including the dendrite growth,surface Al2O3 and solid–electrolyte-interphase(SEI).And we will summarize the reported practice in effort to build better electrode/electrolyte interfaces in *** the end,outlook regarding to the challenges,opportunities and directions is presented.

关键词： Electrochemistry Interface Rechargeable aluminum battery

Insight to defects regulation on sugarcane waste-derived hard carbon anode for sodium-ion batteries

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Journal of Energy Chemistry 2021年第4期30卷 499-508页

作者： Kaihua Yu Xinran Wang haoyi yang Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

A great deal of attention has been paid on developing plant-derived hard carbon(HC)materials as anodes for sodium-ion batteries(SIBs).So far,the regulation of HC has been handicapped by the well-known ambiguity of Na^(+)storage mechanism,which fails to differentiate the Na^(+)adsorption and Na^(+)insertion,and their relationship with the size of d-interlayer spacing and structural ***,bagassederived HC materials have been synthesized through a combination of pyrolysis treatment and microwave *** combined protocol has enabled to synergistically control the d-interlayer spacing and ***,the microwave activation has created slit pores into HC and these pores allow for an enhanced Na^(+)adsorption with an increased sloping capacity,establishing a strong correlation between the porosity and sloping ***,the pyrolysis treatment promotes the graphitization and it contributes to an intensified Na^(+)insertion with an increased plateau capacity,proving that the plateau capacity is largely contributed by the Na^(+)insertion between ***,the structural regulation of bagasse-derived HC has provided a proof on positively explaining the Na^(+)storage with HC *** structural changes in the pore size distribution,specific surface area,d-interlayer spacing,and the electrochemical properties have been comprehensively characterized,all supporting our understanding of Na^(+)storage *** a result,the HC sample with an optimized d-interlayer spacing and porosity has delivered an improved reversible capacity of 323.6 m Ah g^(-1) at 50 m A g^(-1).This work provides an understanding of Na^(+)storage mechanism and insights on enhancing the sloping/plateau capacity by rationally regulating the graphitization and porosity of HC materials for advanced SIBs.

关键词： Hard carbon Sodium-ion batteries Microwave activation Sodium storage mechanism

Designing electrode materials for aluminum-ion batteries towards fast diffusion and multi-electron reaction

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Journal of Energy Chemistry 2021年第9期30卷 229-232页

作者： Lumin Zheng haoyi yang Ying Bai Chuan Wu School of Materials Science&Engineering Beijing Institute of TechnologyBeijing 100081China

Since the electrochemical energy storage was invented, mobile has brought us a new world without wires for more electronic devices [1–4]. Aluminum ion batteries(AIBs) were born with the requirements of electrochemica... 详细信息

关键词： Aluminum-ion batteries Theory research Electrode materials Dynamics Multi-electron reaction

Multi-electron reaction concept for the universal battery design

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Journal of Energy Chemistry 2020年第12期29卷 416-417页

作者： Feng Wu haoyi yang Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering and School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081China

Electrochemical batteries define the contraption stores electricity in the direct form of chemical energy with high efficiency. If the energy conversion process can be reversed, namely the input and output of electricity both being permitted, the batteries are termed rechargeable batteries or also secondary batteries accordingly [1]. These decades have witnessed the rapid development of batteries because of the demands for transportation of information and mass in the mobile area, and stationary storage for the implementation of renewable energy technologies.

关键词： Multi-electron reaction Electrode material Redox chemistry

CoSnO_(3)/C nanocubes with oxygen vacancy as high-capacity cathode materials for rechargeable aluminum batteries

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Green Energy & Environment 2023年第3期8卷 883-892页

作者： Shuainan Guo Mingquan Liu haoyi yang Xin Feng Ying Bai Chuan Wu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019China

Rechargeable aluminum batteries(RABs)are attractive cadidates for next-generation energy storage and conversion,due to the low cost and high safety of Al resources,and high capacity of metal Al based on the three-electrons reaction ***,the development of RABs is greatly limited,because of the lack of advanced cathode materials,and their complicated and unclear reaction *** the novel nanostructured transition metal and carbon composites is an effective route for obtaining ideal cathode *** this work,we synthesize porous CoSnO_(3)/C nanocubes with oxygen vacancies for utilizing as cathodes in RABs for the first *** intrinsic structure stability of the mixed metal cations and carbon coating can improve the cycling performance of cathodes by regulating the internal strains of the electrodes during volume *** nanocubes with porous structures contribute to fast mass transportation which improves the rate *** addition to this,abundant oxygen vacancies promote the adsorption affinity of cathodes,which improves storage *** a result,the CoSnO_(3)/C cathodes display an excellent reversible capacity of 292.1 mAh g^(-1) at 0.1 A g^(-1),a good rate performance with 109 mAh g^(-1) that is maintained even at 1 A g^(-1) and the provided stable cycling behavior for 500 ***,a mechanism of intercalation of Al^(3+)within CoSnO_(3)/C cathode is proposed for the electrochemical ***,this work provides a step toward the development of advanced cathode materials for RABs by engineering novel nanostructured mixed transition-metal oxides with carbon composite and proposes novel insights into chemistry for RABs.

关键词： Rechargeable aluminum batteries Mixed transition-metal oxides CoSnO_(3)/C Cathode material Oxygen vacancy

Bi-salt electrolyte for aqueous rechargeable aluminum battery

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Journal of Energy Chemistry 2022年第4期31卷 613-620页

作者： Yaning Gao Yu Li haoyi yang Lumin Zheng Ying Bai Chuan Wu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019ZhejiangChina

The exertion of superior high-energy density based on multivalent ions transfer of rechargeable aluminum batteries is greatly hindered by limited electrochemical stability window of typical water in salt electrolyte(Wi SE). Recently, it is reported that a second salt addition to the Wi SE can offer further suppression of water activities, and achieves a much wider electrochemical window compared with aqueous Wi SE electrolytes. Hence, we demonstrate a class of water in bi-salt electrolyte containing the trifluoromethanesulfonate(OTF), which exhibits an ultra-wide electrochemical window of 4.35 V and a very low overpotential of 14.6 m V. Moreover, the interface chemistry between cathode and electrolyte is also confirmed via kinetic analysis. Surprisingly, we find the electrolyte can effectively suppress Mn dissolution from the cathode, alleviate self-discharge behavior, and ensure a stable electrode–electrolyte interface based on the interface concentrated-confinement effect. Owing to these unique merits of water in bi-salt electrolyte, the AlxMnO_(2)·nH_(2)O material delivers a high capacity of 364 m Ah g;and superb long-term cycling performance > 150 cycles with a capacity decay rate of 0.37% per cycle with coulombic efficiency at ca. 95%.

关键词： Rechargeable aluminum battery Water in bi-salt electrolyte Wide electrochemical window Stable surface Reaction mechanisms

Multielectron reaction of AlCl_(n) in borophene for rechargeable aluminum batteries

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Energy Material Advances 2022年第1期2022卷 33-44页

作者： Lumin Zheng haoyi yang Ying Bai Chuan Wu Beijing Key Laboratory of Environmental Science and Engineering School of Materials Science&EngineeringBeijing Institute of TechnologyBeijing 100081PR China yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019PR China

As a new 2-dimensional material,borophene is expected to be used in energy storage devices because of its unique electronic ***,its utilization in rechargeable aluminum batteries(RABs)is limited by high valence of Al(3s^(2)3p^(1)).Namely,the Al adsorption borophene is too weak to carry on a multielectron ***,we investigate the origin of unfavorable Al adsorption on borophene that lies at the repulsion of lone pair electrons of 3s orbital with electron-gaining *** of the existing AlCl_(n) compounds during the charging and discharging,we introduce AlCl_(4)^(-),AlCl^(2+),and AlCl^(2+)ions as possible redox carrier in RABs for the first *** sharp contrast,multielectron(over 2 electrons per Al)reaction and high capacity(841 mAh/g for[AlCl]_(0.33)B)can be achieved as a result of Cl *** addition,the diffusion barrier of AlCl^(2+)compound is only 0.08 ***,the binding of Al and Cl in the form of coordinations liberates the electrons in stable states of 3s orbital,breaking the limit of electron transfer on borophene as cathode materials,thus promoting the adsorption of AlCl_(n) *** addition,the energy barrier of the reaction between Al 3s electrons and borophene is decreased in the degenerated *** of the effect of Cl coordination,borophene is suitable for AlCl_(n) storage,not Al3+.These results offer a new insight of the interplay of AlCl_(n) carrier and multielectron reactions in RABs.

关键词： reaction adsorption

Surficial modification enabling planar Al growth toward dendrite-free metal anodes for rechargeable aluminum batteries

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Science China Chemistry 2024年第4期67卷 1341-1351页

作者： Wenhao Liu Yu Li Bo Long haoyi yang Lumin Zheng Ying Bai Feng Wu Chuan Wu School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China yangtze Delta Region Academy of Beijing Institute of Technology Jiaxing 314019China

Al metal possesses ultrahigh theoretical volumetric capacity of 8,040 m Ah cm^(-3),and gravimetric capacity of 2,980 m Ah g^(-1),and thus is highly attractive for electrochemical energy ***,it suffers from several issues,such as the dendrite formation,during Al stripping-deposition cycling,which has been verified to account for the short circuit and limited cyclic ***,we use a facile and applicable method to in-situ reconstruct the Al anode surface with F-Al-O chemical bonds,which could preferentially induce the planar growth of Al along the interface plane,thus leading to the dendrite-free morphology evolution during the *** from F-Al-O chemical bonds on the surface of Al anodes,long lifespan of symmetric cells can be realized even under 1 m A cm^(-2)and 1 m Ah cm^(-2).Coupling the F-Al anode with graphite-based cathodes,high-voltage dual-ion Al metal batteries can be achieved with long-term cycle stability up to 1,200 cycles(at 0.5 m A cm^(-2)),surpassing the counterparts using pristine Al metal ***,the effectiveness of this surficial modification strategy is also elucidated with the aid of theoretical *** work provides novel insights on low-cost and facile strategies against the Al dendrite growth in aluminum batteries.

关键词： rechargeable aluminum batteries Al metal anode Al dendrite dual-ion batteries surficial modification

Design of functional binders for high-specificenergy lithium-ion batteries:from molecular structure to electrode properties

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Industrial Chemistry & Materials

Industrial Chemistry & Materials 2024年第2期2卷 191-225页

作者： Tian Qin haoyi yang Quan Li Xiqian Yu Hong Li Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Beijing Frontier Research Center on Clean Energy Huairou DivisionInstitute of PhysicsChinese Academy of SciencesBeijing 100049China

The binder adheres to each component of the electrode to maintain the structural integrity and plays an irreplaceable role in a battery despite its low *** difluoride(PVDF),as the dominant binder in commercial battery systems(for cathodes),has acceptably balanced properties between chemical/electrochemical stability and adhesive ***,in the pursuit of high-specific-energy batteries featuring high mass loading,high voltage,and large volume changes,the PVDF binder is unable to satisfy the versatile electrode demands and extreme operation ***,developing novel binders with task-specific functionality is of urgent ***,we review the recently developed design strategies of functional binders from the insight of molecular *** functions and failure mechanisms of the binders are elucidated *** from the basic moiety(functional group)of the polymer molecule,how the constituents,molecular structure,and assembly into a supramolecule will affect the properties of the binders,and furthermore the performance of the electrodes,is discussed at ***,we summarize and provide a future outlook on the opportunities and challenges of functional binders towards future high-specific-energy lithium-ion batteries.

关键词： Functional binders Molecular design High-specific-energy electrodes Lithium-ion batteries