Self-supported transition metal oxide electrodes for electrochemical energy storage

Teng, Xiaoling; Sun, Xitong; Guan, Lu; Hu, Han; Wu, Mingbo

doi:10.1007/s42864-020-00068-0

Cited by 46 publications

(19 citation statements)

References 218 publications

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“…For a comprehensive understanding of the reaction mechanisms, Sn–Co alloy thin films were prepared by magnetron sputtering, as shown in Figure a. First, the self-supported films can exclude the complexity of the nanoparticle electrode mixed with binders and conductive additives, − which is conducive to the study of the electrochemical reaction mechanism. More importantly, their stoichiometries and particle sizes can be tuned conveniently for control experiments.…”

Section: Resultsmentioning

confidence: 99%

Unraveling the Evolution of Transition Metals during Li Alloying–Dealloying by In-Operando Magnetometry

Xia

Wang

et al. 2022

Chem. Mater.

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In view of the long-standing controversy over the reversibility of transition metals in Sn-based alloys as an anode for Li-ion batteries, an in situ real-time magnetic monitoring method was used to investigate the evolution of Sn−Co alloy during the electrochemical cycling. Sn−Co alloy film anodes with different compositions were prepared via magnetron sputtering without using binders and conductive additives. The magnetic responses showed that the Co particles liberated by Li insertion recombine fully with Sn during the delithiation to reform Sn−Co alloy into stannum-richer phases Sn 7 Co 3 . However, as the Co content increases, it can only recombine partially with Sn into cobalt-richer phases Sn 3 Co 7 . The unconverted Co particles may form a dense barrier layer and prevent the full reaction of Li with all the Sn in the anode, leading to lower capacities. In addition, we also showed that the Fe can recombine with Sn (Sb) during the delithiation in the Sn (Sb)−Fe alloy film anodes by operando magnetometry. These critical results shed light on understanding the reaction mechanism of transition metals and provide valuable insights toward the design of high-performance Sn (Sb)-based alloy anodes.

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Section: Resultsmentioning

confidence: 99%

Unraveling the Evolution of Transition Metals during Li Alloying–Dealloying by In-Operando Magnetometry

Xia

Wang

et al. 2022

Chem. Mater.

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“…The composite materials composed metal oxides and carbon-based support exhibit high catalytic performance and excellent structural stability. [126][127][128][129][130] Kong et al [63] designed a unique 3D self-branched ZnCo oxide loaded on N-doped carbon hollow nanowall arrays. The catalyst used the hollow carbon arrays as skeletons to increase the contact area between active sites and electrolyte, thus improving the electrocatalytic performance.…”

Section: Metal Nps Sitesmentioning

confidence: 99%

Recent Advances in Metal–Gas Batteries with Carbon‐Based Nonprecious Metal Catalysts

Liu

Shi

Wang

et al. 2021

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exhaust to generate electricity, giving new possibilities for reducing CO 2 emissions and relieving global warming. In addition, there is a lot of N 2 in the air, and nitrogen fixation can transform free N 2 into nitrogen-containing compounds that human needs. The traditional Haber-Bosch nitrogen-fixing process consumes lots of fossil fuels, leading to environmental pollution. [14,15] The metal-N 2 batteries not only use N 2 as the reactive gas, but also give a new way to synthesize the nitrogen-containing compounds and replace the Haber-Bosch nitrogen-fixing process. [16] However, metal-gas batteries face great challenges in their practical application. The sluggish electrode reaction oxygen reduction and evolution reaction (ORR and OER) in rechargeable metal-O 2 batteries resulted in low round-trip efficiency and unacceptably large overvoltage. [38][39][40][41][42] In the case of rechargeable metal-CO 2 batteries, the high overpotential of carbon oxide reduction and evolution reaction (CO 2 RR and CO 2 ER) reactions will lead to electrolyte decomposition, short cycle life, and other problems. [43,44] Besides, highly selective catalysts for nitrogen reduction reaction (NRR) are also required for metal-N 2 batteries to avoid paralleled hydrogen evolution reaction (HER) and improve cell efficiency. [45,46] Therefore, in order to solve the above key problems and improve the cycling efficiency of metal-gas batteries, it is necessary to develop appropriate electrocatalysts.Carbon-based non-noble metal catalysts leap out among many catalysts due to their high surface area, suitable size, and rich variety. [47,48] Carbon-based non-noble metal catalysts usually have carbon nanotube, graphene, or other carbon materials as primary structures with transition metal active sites. [49] In contrast with precious metal catalysts, carbon-based nonprecious metal catalysts have lower cost and better toxicity resistance, and the gap in activity can be made up by increasing the amount of the catalyst loading. [50] In addition, the presence of coordinating atoms (such as N, O, S, and P) benefits the catalytic activities of catalysts. A number of articles have appeared in recent years describing the development of carbon-based non-noble metal catalysts, but reviews relating to the metal-gas batteries with these catalysts are rare. Recently, researches on metal-gas batteries with carbon-based non-precious metal catalysts were reported in large amounts, Figure 1c. This review focuses on the recent studies on carbon-based non-noble metal Metal-gas batteries draw a lot of attention due to their superiorities in high energy density and stable performance. However, the sluggish electrochemical reactions and associated side reactions in metal-gas batteries require suitable catalysts, which possess high catalytic activity and selectivity. Although precious metal catalysts show a higher catalytic activity, high cost of the precious metal catalysts hinders their commercial applications. In contrast, nonprecious metal catalysts complement the we...

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“…Transition metal compounds (TMCs) such as transition metal oxides (TMOs) and transition metal dichalcogenides (TMDs) materials have attracted particular attention as the electrodes thanks to their high theoretical capacity, abundant active sites, and low-cost features. [21][22][23][24][25][26] Yet, both TMOs and TMDs have experienced the pros and cons as electrodes for energy storage devices. In specific, the M-S bonding of TMDs is relatively weaker than the M-O bonding of TMOs, rendering the TMDs with more favorable kinetics during the conversion reaction process accompanied by bond cleavage.…”

Section: Introductionmentioning

confidence: 99%

Harnessing the Defects at Hetero‐Interface of Transition Metal Compounds for Advanced Charge Storage: A Review

Yang

et al. 2022

Small Structures

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The ability of transition metal compounds (TMCs; e.g., transition metal oxides, transition metal dichalcogenides) to achieve maximum energy and power density is undermined by their marginal electrical and ionic conductivity. There has been rapidly growing interest in a paradigm enabled by the construction of heterostructured TMCs over the past decades because it can increase the charge transport and storage capabilities of TMC‐based electrodes. The introduction of defects is a critical tool that allows the manipulation of heterostructures by altering the electronic structure and stress field. In this way, the electrochemical performance of the material can be optimized. Herein, recent progress in the development of heterostructured TMCs from the perspective of defects is comprehensively discussed. It is emphasized the mechanisms by which defects influence the electrochemical performance of heterostructures and effective strategies to incorporate the 0D to 2D defects (vacancies, elemental doping, lateral hetero‐interface, lattice mismatch, etc.) around the hetero‐interface, which is a focus that differs from previous reviews of heterostructured TMCs. Related problems and future directions in the defect chemistry of heterostructured TMCs are also discussed. This review highlights the significance of defects for guiding the rational design of TMC electrodes for use in advanced energy storage devices.

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Self-supported transition metal oxide electrodes for electrochemical energy storage

Cited by 46 publications

References 218 publications

Unraveling the Evolution of Transition Metals during Li Alloying–Dealloying by In-Operando Magnetometry

Unraveling the Evolution of Transition Metals during Li Alloying–Dealloying by In-Operando Magnetometry

Recent Advances in Metal–Gas Batteries with Carbon‐Based Nonprecious Metal Catalysts

Harnessing the Defects at Hetero‐Interface of Transition Metal Compounds for Advanced Charge Storage: A Review

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