Interface Engineering of CoS/CoO@N-Doped Graphene Nanocomposite for High-Performance Rechargeable Zn–Air Batteries

Tian, Yuhui; Xu, Li; Li, Meng; Yuan, Ding; Liu, Xianhu; Qian, Junchao; Dou, Yuhai; Qiu, Jingxia; Zhang, Shanqing

doi:10.1007/s40820-020-00526-x

Cited by 106 publications

(60 citation statements)

References 60 publications

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“…Toward this goal, researchers have adopted various technologies, including pre-intercalation engineering [ 15 ], defect engineering [ 16 , 17 ], interfacial optimization [ 18 , 19 ], and metal-doping [ 20 ], etc. Especially, the incorporation of oxygen vacancies (V O ) is an effective route to improve the rate performance of MnO 2 electrodes.…”

Section: Introductionmentioning

confidence: 99%

Oxygen-Deficient β-MnO2@Graphene Oxide Cathode for High-Rate and Long-Life Aqueous Zinc Ion Batteries

et al. 2021

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Recent years have witnessed a booming interest in grid-scale electrochemical energy storage, where much attention has been paid to the aqueous zinc ion batteries (AZIBs). Among various cathode materials for AZIBs, manganese oxides have risen to prominence due to their high energy density and low cost. However, sluggish reaction kinetics and poor cycling stability dictate against their practical application. Herein, we demonstrate the combined use of defect engineering and interfacial optimization that can simultaneously promote rate capability and cycling stability of MnO2 cathodes. β-MnO2 with abundant oxygen vacancies (VO) and graphene oxide (GO) wrapping is synthesized, in which VO in the bulk accelerate the charge/discharge kinetics while GO on the surfaces inhibits the Mn dissolution. This electrode shows a sustained reversible capacity of ~ 129.6 mAh g−1 even after 2000 cycles at a current rate of 4C, outperforming the state-of-the-art MnO2-based cathodes. The superior performance can be rationalized by the direct interaction between surface VO and the GO coating layer, as well as the regulation of structural evolution of β-MnO2 during cycling. The combinatorial design scheme in this work offers a practical pathway for obtaining high-rate and long-life cathodes for AZIBs.

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Section: Introductionmentioning

confidence: 99%

Oxygen-Deficient β-MnO2@Graphene Oxide Cathode for High-Rate and Long-Life Aqueous Zinc Ion Batteries

et al. 2021

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“…The increased electron-occupied states at the Fermi level suggested the metallic features of the CuS/Cu 9 S 5 heterostructure with enhanced intrinsic conductivity, which further improved the PL. [49,50] In summary, the superiority of the selected CuS/Cu 9 S 5 layer can be summarized as follows:…”

Section: Tunable Emw Shielding/absorption Performance and Their Loss ...mentioning

confidence: 99%

A Flexible, Mechanically Strong, and Anti‐Corrosion Electromagnetic Wave Absorption Composite Film with Periodic Electroconductive Patterns

Zhao

Lan

Zhang

et al. 2021

Adv Funct Materials

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Demand for high-efficiency electromagnetic wave (EMW) absorption composite films continues to increase with technical advances in 5G telecommunications, wearable electronics, portable devices, and deployable military applications. However, realizing flexible ultra-thin single-layer EMW absorption composite films with multifunctionality, rather than using traditional particle absorbents, is a known challenge. In this study, the authors propose a series of polyimide (PI) reinforced composite films with periodic copperbased electroconductive units that possess tunable electrical properties for specific applications. These periodic units optimize the electric field distribution of the films in an alternating electromagnetic field, resulting in stronger power loss. Furthermore, the hierarchical structure and abundant heterogeneous interfaces of each unit contribute to multiple scattering and polarization loss. The obtained copper mesh@Cu 2−x S@PI (CCP) film shows excellent EM shielding performance (63.7 dB), while the Air@Cu 2−x S@PI (ACP) film delivers a superior specific absorbency value of 391.43% mm -1 in the X-band. Furthermore, owing to their mechanical properties, thermal conduction/dissipation performance, and excellent environmental stability characteristics, these films offer significant potential as high-performance EMW response materials with resistance to harsh conditions.

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“…Tian et al. [ 44 ] loaded multiphase CoS/CoO nanocrystals on N doped graphene to synthesize a bifunctional oxygen catalyst (CoS/CoO@NGNs), as shown in Figure a. The high‐resolution XPS spectrum of N 1s (Figure 1b) showed four peaks belonging to pyridinic N, graphitic N, oxidized N, and pyrrolic N, respectively.…”

Section: The Cathodes Of Flexible Zabsmentioning

confidence: 99%

Recent Advances in Flexible Zn–Air Batteries: Materials for Electrodes and Electrolytes

et al. 2021

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Flexible Zn–air batteries (ZABs) draw much attention due to the merits of high energy density, stability, and safety, and show potential applications for wearable devices. However, the development of flexible ZABs with great energy density, high round‐trip efficiency, and long cycle life for practical applications is highly restricted by the lack of highly active oxygen catalysts, high ion‐conducting solid‐state electrolytes, appropriate Zn anodes, and advanced battery configuration. Promising oxygen catalysts should possess both, superior oxygen reduction reaction and oxygen evolution reaction performance and can be directly used as self‐supporting cathodes without loading catalysts on support materials such as carbon cloth. In addition, electrolytes play an important role in ZABs; a good electrolyte should be in all‐solid state with high ion conductivity. Moreover, for an excellent Zn anode, it is required to stably contact the electrolyte interface during the bending process. Therefore, in this review, recent advances in ZABs are summarized, including: i) the powder and 3D self‐supporting oxygen catalysts, ii) the species of solid‐state electrolytes, and iii) the rational design of Zn anodes. Finally, the challenges and opportunities of this promising field are presented.

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Interface Engineering of CoS/CoO@N-Doped Graphene Nanocomposite for High-Performance Rechargeable Zn–Air Batteries

Cited by 106 publications

References 60 publications

Oxygen-Deficient β-MnO2@Graphene Oxide Cathode for High-Rate and Long-Life Aqueous Zinc Ion Batteries

Oxygen-Deficient β-MnO2@Graphene Oxide Cathode for High-Rate and Long-Life Aqueous Zinc Ion Batteries

A Flexible, Mechanically Strong, and Anti‐Corrosion Electromagnetic Wave Absorption Composite Film with Periodic Electroconductive Patterns

Recent Advances in Flexible Zn–Air Batteries: Materials for Electrodes and Electrolytes

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