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- W2877888389 abstract "M–Nb–O compounds are advanced anode materials for lithium-ion batteries (LIBs) due to their high specific capacities, safe operating potentials, and high cycling stability. Nevertheless, the found M–Nb–O anode materials are very limited. Here, Mg2Nb34O87 is developed as a new M–Nb–O material. Mg2Nb34O87 porous microspheres (Mg2Nb34O87-P) with primary-particle sizes of 30–100 nm are fabricated based on a solvothermal method. Mg2Nb34O87 has an open 3 × 4 × ∞ Wadsley–Roth shear structure and a large unit-cell volume, leading to its largest Li+ diffusion coefficients among all the developed M–Nb–O anode materials. In situ X-ray diffraction analyses reveal its high structural stability and intercalating characteristic. These architectural, conductivity, and structural advantages in Mg2Nb34O87-P lead to its most significant intercalation pseudocapacitive contribution (87.7% at 1.1 mV s–1) among the existing M–Nb–O anode materials and prominent rate capability (high reversible capacities of 338 mAh g–1 at 0.1C and 230 mAh g–1 at 10C). Additionally, this new material exhibits a safe operating potential (∼1.68 V), an ultrahigh initial Coulombic efficiency (94.8%), and an outstanding cycling stability (only 6.9% capacity loss at 10C over 500 cycles). All of these evidences indicate that Mg2Nb34O87-P is an ideal anode material for high-energy, safe, fast-charging, and stable LIBs." @default.
- W2877888389 created "2018-07-19" @default.
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- W2877888389 date "2018-07-05" @default.
- W2877888389 modified "2023-10-17" @default.
- W2877888389 title "Mg<sub>2</sub>Nb<sub>34</sub>O<sub>87</sub> Porous Microspheres for Use in High-Energy, Safe, Fast-Charging, and Stable Lithium-Ion Batteries" @default.
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- W2877888389 doi "https://doi.org/10.1021/acsami.8b03997" @default.
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