73 assembled a membrane-free Zn-MnO2 battery (Figure 6E) by using a carbon-felt cathode substrate and a Zn anode in a 1 M MnSO4/1 M ZnSO4 (pH ∼ 3.8) solution as the electrolyte, which was circulated continuously by a motor during battery operation. The configuration of the assembled...
and it can be seen that the CP composite strategy effectively improves Zn2+kinetics. TheEadsvalues of Zn2+on the tunnel-shaped surface of pure γ-MnO2and γ-MnO2@CP are − 2.968 and −
Consequently, the β-PVDF/BMI@Zn||MnO2 full cell reaches a high specific capacity of 186 mAh g−1 after 1600 cycles at 1 A g−1. This work provides a new possibility for the realization of high performance Zn anode.Graphical abstract...
and rechargeable fiber-shaped Zn-air battery was produced from an air cathode involving aligned and cross-stacked CNT sheets for the oxygen reduction reaction (ORR) and a RuO2-based catalyst for the oxygen-evolution reaction (OER), a zinc spring anode, and a free-standing hydrogel polymer elec...
Owing to the rigid host structure and facile Zn diffusion kinetics, the Cu2xSe nanorod anode shows an enhanced coulombic efficiency (above 99.5%), outstanding rate capability and excellent cycling stability. The as‐fabricated ZnxMnO2||Cu2xSe Zn﹊on full battery exhibits an impressive ...
Material for Lithium-Ion Batteries Di Wu1,*, Rui Shen1,*, Rong Yang1, Wenxu Ji1, Meng Jiang2, Weiping Ding1 & Luming Peng1 A simple and effective carbon-free strategy is carried out to prepare mixed molybdenum oxides as an advanced anode material for lithium-ion ...
The presence of this additive in the electrolyte makes it possible to create a protective film at the surface of the electrode, so as to prevent the lithium ions from becoming inserted in the graphite and from damaging it, which has the consequence of improving the performance of the battery....
As a contrast, the energy density of the corresponding Zn//MnO2 battery with Zn foil anode is only 30 Wh kg−1. Aiming to enhance the corrosion resistance of zinc metal, Zn alloy is another substitute to Zn foil so as to increase the overpotential of HER of the Zn anode, suppress ...
Table 1. Overview of some dominant zinc-based battery chemistries. NameOverall Cell Reaction Alkaline 2MnO2 + Zn + 2H2O → 2MnOOH + Zn(OH)2 Zinc-Air 0.5O2 + Zn → ZnO Nickel-Zinc 2NiOOH + Zn + 2H2O → 2Ni(OH)2 + Zn(OH)2 Silver-Zinc AgO + Zn + H2O → Ag + Zn(OH)2 ...
(a) Spray pyrolysis derived silicon sludge waste-generated nanocomposite [219]; (b) physi- cally mixed and dispersed MnO2/GO and MnO2/rGO composites from spent battery powder [230]; (c) drop casted waste wool derived keratin/graphene thin films [217]; (d) hydrothermal synthesis of magnetic ...