Polyoxometalate-based materials for advanced electrochemical energy conversion and storage

Li, Qinyuan; Zhang, Li; Dai, Jian; Tang, Hao; Li, Qing; Xue, Huaiguo; Pang, Huan

doi:10.1016/j.cej.2018.06.074

Cited by 103 publications

(57 citation statements)

References 183 publications

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“…Several common structures have been identified, including Keggin, Anderson, Lindqvist, and Dawson types ( Figure 2), depending on the relative ratio of the addenda atoms and the heteroatoms. 24,67 Advanced structures other than these basic types have been also identified. 68 Polyoxometalates could be modified via engineering the template, addenda atom, heterometal, ligand, and the counterions to achieve desired properties.…”

Section: Structures Of Polyoxometalatesmentioning

confidence: 99%

“…The polyoxometalates can be expressed by the formula [M m O y ] n− for isopolyanions and [X x M m O y ] n− for heteropolyanions, where X is the heteroatom and M is the addenda atom. Several common structures have been identified, including Keggin, Anderson, Lindqvist, and Dawson types (Figure ), depending on the relative ratio of the addenda atoms and the heteroatoms . Advanced structures other than these basic types have been also identified .…”

Section: Introductionmentioning

confidence: 99%

“…Metal oxide semiconductors, including TiO 2 , NiO, SnO 2 , WO 3 , ZnO, Fe 2 O 3 , CuO, and V 2 O 5 , are important ingredients for various energy devices due to their desired electronic and optical properties . The stoichiometry in the metal oxides may vary depending on the synthetic procedures.…”

Section: Introductionmentioning

confidence: 99%

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Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Zhang

Chen

2020

Int J Energy Res

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Summary Polyoxometalates could be viewed as the molecular counterpart of the metal oxides, which are essential ingredients for various energy conversion and storage applications. In this manuscript, we review the progress of engineering functional polyoxometalates toward energy applications, focusing on, but not limited to, polyoxotitanate, polyoxotungstate, and polyoxomolybdate. These polyoxometalates are considered to be promising candidates for dye‐sensitized solar cell, perovskite solar cell, lithium‐ion battery, lithium‐sulfur battery, supercapacitor, and water‐splitting system. We believe advanced energy devices with better performance could be derived from further engineering the polyoxometalates owing to their molecular design flexibility.

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Section: Structures Of Polyoxometalatesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Zhang

Chen

2020

Int J Energy Res

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“…In the family of POMbased pseudocapacitive materials, composites of POMs and conductive polymers are attractive options for MCDI electrodes. [59,60] In traditional CDI electrodes, the pseudocapacitive powderm ateriali sa ttached to the current collector by a binder,w hich impedes electron transport and greatly decreases SAC and SAR. In contrast to traditional CDIe lectrodes, 3D CDI electrodes fabricated by directly depositing pseudocapacitive material on ac urrent collector have more advantages.…”

Section: Introductionmentioning

confidence: 99%

A Polyoxometalate‐Based Binder‐Free Capacitive Deionization Electrode for Highly Efficient Sea Water Desalination

Liu

Zhang

et al. 2020

Chemistry A European J

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Capacitive deionization is a promising technique in sea water desalination. Compared with common electrodes, mixed capacitive‐deionization electrodes exhibit better performance in sea water desalination because they integrate pseudocapacitance and electric double‐layer capacitance in one system. Herein, a 3D binder‐free mixed capacitive‐deionization electrode was fabricated by direct electrodeposition of SiW12O404− and polyaniline on a 3D exfoliated graphite carrier. In this electrode, SiW12O404−/polyaniline composite particles with a size of about 100–120 nm are dispersed homogenously on the 3D exfoliated graphite carrier. Its specific capacitance reaches 352 F g−1 at 1 A g−1. With increasing current from 1 to 20 A g−1, the specific capacitance only decays by 32 %. When employed in sea water desalination, the performance of this mixed capacitive‐deionization electrode is also excellent. At 1.2 V, the salt adsorption capacity of this mixed electrode reaches 23.1 mg g−1 with a salt adsorption rate of 1.38 mg g−1 min−1 in 500 mg L−1 NaCl. The performance of this electrode is well retained after 30 cycles. The excellent sea water desalination performance originates from the synergistic effect between SiW12O404− and polyaniline. This work has developed polyoxometalate as a new material for capacitive‐deionization electrodes.

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“…Layered transitional metal oxides NaMnO 2 has been explored for past few decades as cathode materials since the study of Parant et al 1 However, previous literatures all share inadequate discharge capacity (approximately 150 mAh g −1 ) drawback, which is tough to be applied in industrial production. [2][3][4][5][6] Therefore, the enthusiasm of exploring high capacity layered sodium ion cathodes decay for a short period. Fortunately, anionic oxide redox has triggered widespread research attention through extending the discharge capacity by alternating oxygen chemistry in the layered oxide.…”

Section: Introductionmentioning

confidence: 99%

Li‐doping stabilized P2‐Li _0.2 Na _1.0 Mn _0.8 O ₂ sodium ion cathode with oxygen redox activity

et al. 2020

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Summary The discovery of the oxygen chemistry phenomenon reveals bright future toward new sustainable layered Na‐based transitional oxides. However, the poor capacity retention problem of the cathode has hindered the development of sodium ion batteries (SIBs). In this work, a new Li‐doped compound Li0.2Na1.0Mn0.8O2 is proposed, which demonstrates refined cycling durability with 51.6% after 100 cycles at 50 mA g−1, superior than Na1.2Mn0.8O2 with only one cycle. Then in situ X‐ray diffraction (XRD) and density function theory (DFT) are employed to explore the lattice distortion and confirm stable lattice framework introduced by Li atoms with eliminated P2‐O2 phase transition upon cycling, guaranteeing outstanding electrochemically stable performance. In addition, Li0.2Na1.0Mn0.8O2 demonstrates activation of Mn as well as O chemistry redox in the lattice, detected by ex situ electronic paramagnetic resonance spectroscopy (EPR) as well as in situ Raman, which indicate not only Na‐deficient Mn‐based layered oxide but also Na‐rich Mn‐based compound can represent oxygen redox.

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Polyoxometalate-based materials for advanced electrochemical energy conversion and storage

Cited by 103 publications

References 183 publications

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

A Polyoxometalate‐Based Binder‐Free Capacitive Deionization Electrode for Highly Efficient Sea Water Desalination

Li‐doping stabilized P2‐Li _0.2 Na _1.0 Mn _0.8 O ₂ sodium ion cathode with oxygen redox activity

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Polyoxometalate-based materials for advanced electrochemical energy conversion and storage

Cited by 103 publications

References 183 publications

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

Polyoxometalates: Tailoring metal oxides in molecular dimension toward energy applications

A Polyoxometalate‐Based Binder‐Free Capacitive Deionization Electrode for Highly Efficient Sea Water Desalination

Li‐doping stabilized P2‐Li 0.2 Na 1.0 Mn 0.8 O 2 sodium ion cathode with oxygen redox activity

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Li‐doping stabilized P2‐Li _0.2 Na _1.0 Mn _0.8 O ₂ sodium ion cathode with oxygen redox activity