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Reversible Al^(3+) storage mechanism in anatase TiO_(2) cathode material for ionic liquid electrolyte-based aluminum-ion batteries

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Journal of Energy Chemistry 2020年第12期29卷 72-80页

作者： Na Zhu Feng Wu Zhaohua Wang Liming Ling Haoyi Yang Yaning Gao Shuainan Guo liumin Suo Hong Li Huajie Xu 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 Guangdong Engineering and Technology Research Center for Advanced Nanomaterials School of Environment and Civil EngineeringDongguan University of TechnologyDongguan 523808GuangdongChina Key Laboratory for Renewable Energy Beijing Key Laboratory for New Energy Materials and DevicesInstitute of PhysicsChinese Academy of Sciences.Beijing 100190China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002HenanChina

Rechargeable aluminum ion battery(AIB) with high theoretical specific capacity, abundant elements and low cost engages considerable attention as a promising next generation energy storage and conversion system. Nevertheless, to date, one of the major barriers to pursuit better AIB is the limited applicable cathode materials with the ability to store aluminum highly reversibly. Herein, a highly reversible AIB is proposed using mesoporous TiO2 microparticles(M-TiO2) as the cathode material. The improved performance of Ti O2/Al battery is ascribed to the high ionic conductivity and material stability, which is caused by the stable architecture with a mesoporous microstructure and no random aggregation of secondary particles. In addition, we conducted detailed characterization to gain deeper understanding of the Al^(3+) storage mechanism in anatase Ti O2 for AIB. Our findings demonstrate clearly that Al^(3+)can be reversibly stored in anatase TiO2 by intercalation reactions based on ionic liquid electrolyte. Especially, DFT calculations were used to investigate the accurate insertion sites of aluminum ions in M-Ti O2 and the volume changes of M-TiO2 cells during discharging. As for the controversial side reactions in AIBs, in this work, by normalized calculation, we confirm that M-Ti O2 alone participate in the redox reaction. Moreover, cyclic voltammetry(CV) test was performed to investigate the pseudocapacitive behavior.

关键词： Aluminum ion battery Anatase TiO_(2) Al-ion storage intercalation reaction Pseudocapacitive behavior

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Controlled WS_(2) crystallinity effectively dominating sodium storage performance

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Journal of Energy Chemistry 2020年第12期29卷 143-153页

作者： Xiaomin Luo Jianfeng Huang Jiayin Li Liyun Cao Yong Wang Zhanwei Xu Ling Guo Yayi Cheng Koji Kajiyoshi Shaoyi Chen School of Materials Science and Engineering Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic MaterialsShaanxi University of Science and TechnologyXi'an 710021ShaanxiChina Kochi University Research Laboratory of Hydrothermal ChemistryKochi 780-8520Japan Dingxin Cells Co. Ltd.Nantong 226600JiangsuChina

WS2 exhibits tremendous potentials for Na-ions storage owing to high capacity(433 mAh g^(-1)). Nevertheless, WS2 layered structure is often exfoliated with rapid capacity decay and sluggish reaction *** this work, WS2 nanosheets with different crystallinities are controlled by different synthesis *** high crystallinity WS2 exhibits high degree of interlayer order and strong interlayer force. It exhibits superior electrochemical properties, at the current density of 200 mA g^(-1) after 300 cycles with reversible capacity of 471 mAh g^(-1). Even at 5.0 A g^(-1), the capacities can still arrive at 240 mAh g^(-1) after 250 cycles, exhibiting stable cycling performance. Further electrochemical research finds that the high degree of interlayer order of layered WS2 structure can perform highly conducive Na+insertion/extraction with greatly improved contribution of intercalation capacity. Moreover, the strong interlayer force can effectively restrain the exfoliating of the WS2 nanosheets, guaranteeing the stability of the structure. Combining the above result reveals that controlling the order and force of the interlayer is an effective way to enhance the electrochemical properties of WS2 as SIBs anode materials. This work can provide new insight for inhibiting the exfoliation of layered compounds to pursue excellent electrochemical performance in Na-ion storage systems.

关键词： WS_(2) Crystallinity intercalation reaction Degree of interlayer order Interlayer force

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Identification of reversible insertion-type lithium storage reaction of manganese oxide with long cycle lifespan

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Journal of Energy Chemistry 2020年第7期29卷 144-151,I0005页

作者： Yuxuan Zhang Fang Lian Jianhao Lu Laijun Ma Ning Chen Yanan Chen Dingguo Xia School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Materials Science and Engineering Tianjin UniversityTianjin 300350China Department of Energy and Resources Engineering College of EngineeringPeking UniversityBeijing 100871China

Recently,MnO2 has gained attention as an electrode material because of its very high theoretical capacity and abundant ***,the very high volumetric change caused by its conversion-type reaction results in bad reversibility of *** this study,δ-MnO2 of thickness 8 nm anchored on the surface of carbon nanotubes(CNT)by Mn-O-C chemical bonding is synthesized via a facile hydrothermal *** ex-situ characterizations of the lithium storage process were ***,density functional theory(DFT)calculations indicated thatδ-MnO2(012)thermodynamically prefers bonding with ***,the interfacial interaction reinforces the connection of Mn-O and reduces the bond strength of Li-O in lithiated MnO2,which could facilitate an intercalation-type lithium storage ***,the as-synthesizedδ-MnO2 retains an excellent reversible capacity of 577.5 mAh g-1 in 1000 cycles at a high rate of 2 A g-1 between 0.1 V and 3.0 *** results of this study demonstrate the possibility of employing the cost-effective transition metal oxides as intercalation lithium storage dominant electrodes for advanced rechargeable batteries.

关键词： Rechargeable batteries Manganese dioxide Carbon nanotubes intercalation reaction Lithium storage process

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The role of oxygen vacancies in metal oxides for rechargeable ion batteries

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Science China Chemistry 2021年第11期64卷 1826-1853页

作者： Runzhe Wei Yi Lu Yang Xu Department of Chemistry University College LondonLondonWC1H 0AJUK

Rechargeable ion batteries are one of the most reliable energy storage technologies for the applications ranging from small portable devices and electric vehicles to renewable energy integration and large-scale stationary energy *** the roadmap of developing and understanding new electrode materials for rechargeable ion batteries,oxygen vacancies,known as defects in metal oxides,have shown a high impact on the final electrochemical performance of the *** present review aims to summarise the synthesis methods and characterisation techniques of oxygen vacancies as well as some of the most recent and exciting progress made to understand the role of oxygen vacancies in the electrochemical performance of Li-,Na-,K-and Zn-ion *** review discusses not only the role of oxygen vacancies directly in electrode materials and indirectly in the coating layers on electrode materials,but also the synergistic role of oxygen vacancies interplaying with other contributors such as carbonaceous materials,doping,amorphisation,structural transformation,nanostructuring and functional ***,perspectives are given to stimulate new ideas and open questions to facilitate the further development of oxygen deficient electrode materials in energy research landscape.

关键词： oxygen vacancies defect chemistry metal oxide rechargeable ion batteries ion diffusion intercalation reaction conversion reaction

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Key parameters of two typical intercalation reactions to prepare hybrid inorganic–organic perovskite films

Key parameters of two typical intercalation reactions to pre...

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第六届新型太阳能电池材料科学与技术学术研讨会

作者： Biao shi Qi Wang Xinghua Cui Jingjing Liu Institute of Photoelectronic Thin Film Devices and Technology Nankai University

A star hybrid inorganic–organic perovskite material selected as an outstanding absorbing layer in solar cells benefits from multiple preparation techniques and excellent photoelectric characteristics. Among numerous synthetic processes, uniform, compact, and multi-stack perovskite thin films can be manufactured using vacuum deposition. During sequential vacuum deposition, the penetration ability of the organic molecules cannot be effectively controlled. In addition, the relationship between the thickness of the inorganic seeding layer and the organic molecule concentration for optimized devices using an evaporation–solution method is unclear. In this work, we prepared high-quality perovskite films by effectively controlling the penetration ability and chemical quantity of organic methyl ammonium iodide by monitoring the evaporation pressure and time. Thus, a device efficiency of over 15% was achieved with an all-vacuum prepared perovskite film. For the evaporation–solution method, we reacted different thicknesses of inorganic lead iodine with various concentrations of the organic molecule solution. The inorganic layer thickness and organic molecule concentration showed a linear relationship to achieve an optimum perovskite film, and an empirical formula was obtained. This work noted the key parameters of two intercalation reactions to prepare perovskite films, which paves a way to deliver a device that enables multi-layered structures, such as tandem solar cells.

关键词： perovskite solar cell sequential vacuum deposition evaporation–solution method intercalation reaction

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Synthesis and Photocatalytic Property of the ZrO_2/TiO_2 Pillared Laponite

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Journal of Wuhan University of Technology(Materials Science) 2011年第5期26卷 852-856页

作者：林英光 College of Materials Science and Engineering South China University of Technology

The ZrO2/TiO2 pillared laponite （Ti-Zr-lap） photocatalysts were prepared with intercalation reaction by supercritical fluid drying （SCFD）,and characterized by XRD,TEM,SEM and BET surface area analysis,and the photocatalytic properties of Ti-Zr-lap were investigated by degradation of azo dye acid red B （ARB）.The results showed that the ZrO2/TiO2 pillared structures in laponite could be formed,with the mass fraction of （Zr4＋＋Ti4＋）/laponite （Xm） increasing,the basal spacing and the BET surface area of Ti-Zr-lap significantly *** Ti-Zr-lap used as photocatalyst had the advantages of stable and porous layered structure,large surface area with the anatase type *** with the Ti-Zr-lap dried by air drying,the Ti-Zr-lap dried by SCFD showed better photocatalytic property which was very close to that of P25 *** the Ti-Zr-lap as photocatalyst with the optimum Xm of 0.16 and the calcination temperature of 500 ℃,under the conditions of the initial concentration of ARB 20 mg/L,photocatalyst concentration of 1.5 g/L and irradiation time 60 min,the decoloring rate of ARB could achieve 98.3%,indicating that the Ti-Zr-lap had excellent photocatalytic property.

关键词： ZrO2/TiO2 pillared laponite photocatalytic property intercalation reaction supercritical fluid drying

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