Vertically-oriented zinc-doped γ-MnO2 nanowalls as high-rate anode materials for li-ion batteries

Ko, Wen Yin; Sitindaon, Rina Se; Lubis, Andre Lammiduk; Yang, Yan; Wang, Ho Ya; Lin, Shin Ting

doi:10.1016/j.est.2022.105329

Cited by 8 publications

(6 citation statements)

References 75 publications

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“…[45] The value σ can be obtained from the Z'-ω À 1/2 line in the low frequency region, in which the smaller the positive slope, the faster the ion diffusion. [46] As depicted in Figure 4d, the slope of ZnMM-NSs (273.8) is lower than the slope of MnO 2 -NSs (316.4), indicating the Zn ion diffusion behavior of ZnMM-NSs electrode is better than that of MnO 2 -NSs one, which is beneficial for battery applications.…”

Section: Chemelectrochemmentioning

confidence: 90%

Facile Construction of Zn‐Doped Mn₃O₄−MnO₂ Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

Lubis

Wang

et al. 2022

ChemElectroChem

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Aqueous rechargeable batteries with good electrochemical performances have been considered as compelling alternatives in miniaturized energy storage units due to their small-size, better safety, greener manufacturing condition, and easy-torecycle process. Herein, a binder-free manganese oxide (MnO x ), comprising of MnO 2 and Mn 3 O 4 constructed by engineering it with zinc doping used as a cathode material for eco-friendly aqueous Zn ion battery is developed. A green and simple electrochemical deposition synthesis of Zn-doped Mn 3 O 4 À MnO 2 nanocomposite with vertically-oriented 3D porous cereal-like nanosheet framework (ZnMM-NSs) is reproducibly performed directly onto the surface of AgCNT modified Ni foam in a mild aqueous ZnSO 4 + MnSO 4 electrolyte. To the best of our knowl-edge, this is the first report on Zn doping in Mn 3 O 4 À MnO 2 nanocomposite and the subsequent device assembly for aqueous zinc-ion batteries. Zinc doping induced electrical/ionic conductivity enhancement, along with more active sites provided by 3D porous cereal-like nanostructures and multiple Mn valences, this ZnMM-NSs cell can deliver a high capacity, good rate performance, and satisfying cycling stability. Also, the Zn-doped manganese oxides are obtained by a green method, which can reduce the entire cost, the usage of toxic solvents, the consumption of energy, and the disposable by-product, paving the way for developing cost-effective, easy-to-recycle, and environmentally friendly next-generation energy storage systems.

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Section: Chemelectrochemmentioning

confidence: 90%

Facile Construction of Zn‐Doped Mn₃O₄−MnO₂ Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

Lubis

Wang

et al. 2022

ChemElectroChem

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“…As shown in Figure 10, the EIS of MnO2 NTs, 5% MnO2/CNF and 20% MnO2/CNF are composed of semicircles and oblique lines, the high-middle frequency regions of the semicircles represent the charge transfer impedance of the electrode. The smaller the diameter of the arc, the lower the charge transfer impedance [46,47]. It is obvious that 5% MnO2/CNF and 20% MnO2/CNF have a smaller semicircle and the similar impedance values, indicating that both of them have a lower charge transfer impedance compared with MnO2 NTs.…”

Section: Electrochemical Performancementioning

confidence: 99%

“…The charge transfer resistances of MnO 2 NTs, 5% MnO 2 /CNF and 20% MnO 2 /CNF are 205, 245, and 495 Ω, respectively. The low frequency regions of the oblique lines are caused by the Warburg impedance of the ion diffusion; the larger the angle between the oblique line and the real axis, the better the ion diffusion of the capacitor, the higher electrochemical capacitance [35,46]. In Figure 10, the slope of the impedance lines of 5% MnO 2 /CNF and 20% MnO 2 /CNF is larger than that of MnO 2 NTs, and 5% MnO 2 /CNF is the best of them, but the impedance semicircle of 5% MnO 2 /CNF is rotated.…”

Section: Electrochemical Performancementioning

confidence: 99%

MnO2/Carbon Nanofibers Material as High-Performance Anode for Lithium-Ion Batteries

Zhao

et al. 2023

Coatings

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MnO2 has advantages such as the simple and diverse preparation methods, low cost and high theoretical capacity, but its industrial application is affected by its poor conductivity and fast attenuation of cycle performance. In order to improve its conductivity, battery capacity and performance, MnO2/carbon nanofibers (MnO2/CNFs) are obtained by using electrospinning technology, and the electrochemical performance was confirmed by XRD, SEM, TEM. Confirmed by comparison, the 20% MnO2/CNFs exhibit superior and excellent long cycling performance with a reversible capacity of 835 mA h g−1 at 0.1 A g−1 after the 133th cycle and a high initial specific capacity of 1094 mA h g−1 at a current density of 0.1 A g−1. The MnO2/CNFs have notable specific capacities with a coulombic efficiency of 99.5%, which greatly improve the reaction rate. This can also be used as a flexible electrode material because of its good flexibility. Due to the fact that carbon has better electron/ion conductivity, it shows better kinetics.

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“…This enhancement can be supported by the EIS data. As revealed by the EIS spectrum (figure 7(c) and figure S6(a)), the P-TMC cell displays a smaller semi-circle in the high-frequency region corresponding to lower charge transfer resistance (R ct ) and a higher Warburg slope in the low-frequency region referring to faster ion diffusion speed and ion storage kinetics, as compared to those of the d-TMC and TMC cells [47,48]. To further discuss the ion diffusion of these cells (figure 7(d) and figure S6(b)), the corresponding ion diffusion coefficient D, which is related to Warburg impedance coefficient (σ w ) from the linear fitting of Z′ and ω −1/2 in the low-frequency range, is investigated according to the following equations [49,50]:…”

Section: Electrochemical Performance Measurementsmentioning

confidence: 99%

“…In addition, figure 9(a) shows the CV curves recorded at various sweep rates, which can be applied to elucidate the pseudo-capacitive electrochemical behaviors involved in LIB. To be specific, the effects of diffusion-controlled and surface pseudocapacitive reactions could be distinguished from the power-law equation of i = av b , in which a and b are the constants for the power-law exponent, and v is the sweep rate [47,53]. In general, the b-value, determined by the relationship between peak current and the sweep rate and derived from the slope of log(i) against log(v), is applied to qualitatively classify the electrochemical behaviors for diffusion-control process as the b-value is close to 0.…”

Section: Electrochemical Performance Measurementsmentioning

confidence: 99%

Phosphorus-doped TiO₂ mesoporous nanocrystals for anodes in high-current-rate lithium ion batteries

Ko,

Wu,

et al. 2024

Nanotechnology

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Limited by the intrinsic low electronic conductivity and inferior electrode kinetics, the use of TiO2 as an anode material for lithium ion batteries (LIBs) is hampered. Nanoscale surface-engineering strategies of morphology control and particle size reduction have been devoted to increase the lithium storage performances. It is found that the ultrafine nanocrystal with mesoporous framework plays a crucial role in achieving the excellent electrochemical performances due to the surface area effect. Herein, a promising anode material for LIBs consisting of phosphorus-doped TiO2 mesoporous nanocrystals (P-TMC) with ultrafine size of 2-8 nm and high specific surface area of 234.164 m2 g─1 has been synthesized. It is formed through a hydrothermal process and NaBH4 assisted heat treatment for anatase defective TiO2 (TiO2-x) formation followed by a simple gas phosphorylation process in a low-cost reactor for P-doping. Due to the merits of the large speciﬁc surface area for providing more reaction sites for Li+ ions to increase the storage capacity and the presence of oxygen vacancies and P-doping for enhancing material’s electronic conductivity and diffusion coefﬁcient of ions, the as-designed P-TMC can display improved electrochemical properties. As a LIB anode, it can deliver a high reversible discharge capacity of 187 mAh g─1 at 0.2 C and a good long cycling performance with ~82.6 % capacity retention (101 mAh g─1) after 2500 cycles at 10 C with an average capacity loss of only 0.007% per cycle. Impressively, even the current rate increases to 100 times of the original rate, a satisfactory capacity of 104 mAh g−1 can be delivered, displaying good rate capacity. These results suggest the P-TMC a viable choice for application as an anode material in LIB applications. Also, the strategy in this work can be easily extended to the design of other high-performance electrode materials with P-doping for energy storage.

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Vertically-oriented zinc-doped γ-MnO2 nanowalls as high-rate anode materials for li-ion batteries

Cited by 8 publications

References 75 publications

Facile Construction of Zn‐Doped Mn₃O₄−MnO₂ Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

Facile Construction of Zn‐Doped Mn₃O₄−MnO₂ Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

MnO2/Carbon Nanofibers Material as High-Performance Anode for Lithium-Ion Batteries

Phosphorus-doped TiO₂ mesoporous nanocrystals for anodes in high-current-rate lithium ion batteries

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Vertically-oriented zinc-doped γ-MnO2 nanowalls as high-rate anode materials for li-ion batteries

Cited by 8 publications

References 75 publications

Facile Construction of Zn‐Doped Mn3O4−MnO2 Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

Facile Construction of Zn‐Doped Mn3O4−MnO2 Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

MnO2/Carbon Nanofibers Material as High-Performance Anode for Lithium-Ion Batteries

Phosphorus-doped TiO2 mesoporous nanocrystals for anodes in high-current-rate lithium ion batteries

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Facile Construction of Zn‐Doped Mn₃O₄−MnO₂ Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

Facile Construction of Zn‐Doped Mn₃O₄−MnO₂ Vertical Nanosheets for Aqueous Zinc‐Ion Battery Cathodes

Phosphorus-doped TiO₂ mesoporous nanocrystals for anodes in high-current-rate lithium ion batteries