Optimizing oxygen vacancies can improve the lithium storage properties in NiO porous nanosheet anodes

Liu, Yanguo; Chen, Jiayuan; Zhang, Hongzhi; Wei, Zhiqiang; Yu, Tingli; Qian, Lizhi; Wang, Zhiyuan; Luo, Shaohua; Li, Zhipeng; Sun, Hongyu

doi:10.1016/j.matchar.2020.110447

Cited by 16 publications

(7 citation statements)

References 46 publications

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“…Moreover, the binding energy of 871.7 and 873.1 eV are in accordance with the Ni 2p 1/2 signals, and the satellite peak is located at 879.6 eV. [20] ). [20,21] The relative abundance of oxygen vacancies could be assumed as O II /(O I + O II + O III ).…”

Section: Resultssupporting

confidence: 58%

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Simple Controllable Fabrication of Novel Flower‐Like Hierarchical Porous NiO: Formation Mechanism, Shape Evolution and Their Application into Asymmetric Supercapacitors

Wei

Cao

et al. 2022

ChemElectroChem

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The rational tailoring of micro‐ and mesoporous distribution for porous transition metal oxide‐based nanomaterials is an important factor to control their electrochemistry performances. Herein, flower‐like hierarchical microspheres assembled by ultrathin nickel oxide (NiO) nanosheets were synthesized by a facile solvothermal route and subsequent annealing process. Theoretical analysis and experimental results demonstrate that NiO ultrathin nanosheets prepared by calcination at 450 °C (N‐450) have the optimal micro‐ and mesoporous distribution. The optimal microstructure provides plenty of ion transport channels and abundant active sites. As expected, the N‐450 electrode delivers an ultrahigh specific capacity of 546.53 F g−1 at a current density of 2 A g−1, which is greater than other electrodes. Remarkably, the assembled N‐450//AC asymmetric supercapacitor (ASC) achieves a high energy density of 29.7 Wh kg−1 (at a power density of 800 W kg−1) and exhibits an excellent cycling stability. This work demonstrates an available avenue to enhance the performance of supercapacitor by accurately controlling calcination temperature to adjust the porous architectures of ultrathin NiO nanosheets.

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Section: Resultssupporting

confidence: 58%

“…[20] ). [20,21] The relative abundance of oxygen vacancies could be assumed as O II /(O I + O II + O III ). [22] As known from the calculation, the relative abundance of oxygen vacancies in N-450 is about 32.09 %.…”

Section: Resultsmentioning

confidence: 99%

Simple Controllable Fabrication of Novel Flower‐Like Hierarchical Porous NiO: Formation Mechanism, Shape Evolution and Their Application into Asymmetric Supercapacitors

Wei

Cao

et al. 2022

ChemElectroChem

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“…Benefitting from the advantages mentioned above, the as-prepared Ni@NiO-45 presents good Li ion storage capability and better than a lot of reported NiO-based anodes, as displayed in Table 1. 22,24,[77][78][79][80][81][82][83][84][85] To analyze the effects of oxygen vacancies on Li ion adsorption ability and electrochemical performance, the DFT calculations were performed. The atomic structure models of pure NiO and oxygen vacancies-rich NiO 1Àx (Ni@NiO-45) are constructed and shown in Figure 5A, B.…”

Section: Resultsmentioning

confidence: 99%

Eutectic‐derived bimodal porous Ni@ NiO nanowire networks for high‐performance Li‐ion battery anodes

Luo

Wang

Chen

et al. 2022

Intl J of Energy Research

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Summary Severe mechanical degradations and sluggish ion/electron migration are challenges for developing high‐performance NiO‐based anodes. Herein, by accelerating the solidification process of eutectic precursors, bimodal porous Ni@NiO nanowire networks containing refined one‐dimensional nanowire skeleton, abundant porous structure and large number of surface oxygen defects are obtained. The well‐designed porous networks can effectively adapt to the volumetric variation of electrode during cycling. In addition, the density functional theory computation confirms that oxygen vacancies play an important role in providing superior Li capture ability, enhancing the electrical conductivity and surface reactivity. Benefiting from the above advantages, the Ni@NiO‐45 anode presents impressive cycling stability, delivering a reversible capacity of 697.9 mAh g−1 after 100 cycles at a current density of 100 mA g−1. The proposed structural regulating strategy in this study is anticipated to promote the exploitation of high‐performance conversion anodes and the application of dealloying technology in extensive fields.

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“…For example, hollow and mesoporous ZnTe microspheres based on the hydrothermal approach may be a good anode material. 94 In addition, porous MTs can also be prepared based on the corresponding porous oxides by CVD, 117–119 including porous NiO, Co 3 O 4 , TiO 2 , ZrO 2 , and CeO 2 et al Depositing anode materials on Cu copper or Ni foam can avoid the use of binder and conductive agents, which can save manufacture process, avoid side reactions, and further improve the energy density of batteries. However, the binder-free MTs electrodes for alkali metal ion have rarely been reported, which can be prepared by electrochemical deposition.…”

Section: Discussionmentioning

confidence: 99%

Recent advances of metal telluride anodes for high-performance lithium/sodium–ion batteries

et al. 2022

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Optimizing oxygen vacancies can improve the lithium storage properties in NiO porous nanosheet anodes

Cited by 16 publications

References 46 publications

Simple Controllable Fabrication of Novel Flower‐Like Hierarchical Porous NiO: Formation Mechanism, Shape Evolution and Their Application into Asymmetric Supercapacitors

Simple Controllable Fabrication of Novel Flower‐Like Hierarchical Porous NiO: Formation Mechanism, Shape Evolution and Their Application into Asymmetric Supercapacitors

Eutectic‐derived bimodal porous Ni@ NiO nanowire networks for high‐performance Li‐ion battery anodes

Recent advances of metal telluride anodes for high-performance lithium/sodium–ion batteries

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