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Moreover, the high overpotential of the hydrogen evolution reaction on zinc electrodes enables the construction of aqueous batteries, which show promise for safe, environmentally friendly, and inexpensive energy storage. Manganese dioxide (MnO 2) was one of the first compounds proposed as a positive electrode for ZIBs [ , , ].
Provided by the Springer Nature SharedIt content-sharing initiative This study reports the phase transformation behaviour associated with electrolytic manganese dioxide (EMD) utilized as the positive electrode active material for aqueous zinc-ion batteries.
Manganese dioxide was the first positive electrode material investigated as a host for Zn 2+ insertion in the rechargeable zinc-ion battery (ZIB) with a zinc metal negative electrode [ 1, 2, 3 ]. The electrolyte in ZIBs is typically an aqueous solution of zinc sulfate or trifluoromethanesulfonate (triflate).
Unlike the alkaline electrolytes, a neutral flow system can effectively avoid the zinc dendrite issues. As a result, a Zn–Mn flow battery demonstrated a CE of 99% and an EE of 78% at 40 mA cm −2 with more than 400 cycles.
Here, the realization of a direct transition from Mn2+ to MnO2 affords a Zn–Mn battery with high cycling stability and makes the rechargeable Zn–Mn battery more practical. In addition, the neutral system can effectively avoid zinc dendrites as well.
Zinc–manganese primary batteries under an alkaline medium have dominated the battery market for several decades. However, the poor stability of the positive electrode and the zinc dendrites are always the critical issues that prevent them becoming rechargeable.
The intercalation mechanism of zinc ions into α-MnO2 during discharge involves a reversible phase transition of MnO2 from tunneled to layered polymorphs by electrochemical …
Compared with nonaqueous secondary batteries, rechargeable batteries using aqueous solutions as electrolytes have the advantages of low cost, high safety, high ionic conductivity, and facile processing. 8, 9 Among …
As a result of the superior battery performance, the high safety of aqueous electrolyte, the facile cell assembly and the cost benefit of the source materials, this zinc …
By assembling a Zn–Mn battery with the modified positive electrode, a CE of about 99% and an energy efficiency of about 78% could be achieved at a current density of 40 mA cm −2, which is much higher than the pristine graphite felt .
Aqueous zinc-ion batteries (AZIBs) have recently attracted worldwide attention due to the natural abundance of Zn, low cost, high safety, and environmental benignity. Up to the present, several kinds of cathode materials …
Manganese (Mn) based batteries have attracted remarkable attention due to their attractive features of low cost, earth abundance and environmental friendliness. However, the poor stability of the positive …
Static rechargeable Zn/MnO 2 battery under neutral medium Zinc–manganese primary batteries under an alkaline medium have dominated the battery market for several decades. However, …
The recycling complexity of spent alkaline zinc-manganese dry batteries contributes to environmental pollution and suboptimal resource utilization, highlighting the …
The proposed iodine electrode is substantially promising for the design of future high energy density aqueous batteries, as validated by the zinc-iodine full battery and the...
This work developed the feasibility of quasi-eutectic electrolytes (QEEs) in zinc–manganese batteries, in which the optimization of ion solvation structure and Stern layer …
The charge–discharge characteristics of ZIBs with MnO 2 positive electrodes based on these polymorphs both at the initial stages of their operation and under long-term …
In the past three years, P2-Na x MeO 2 has become an extensively studied positive electrode material for sodium batteries.4,43,58–63 All of the P2-Na x MeO 2 materials …
Compared to the alkaline Zn-MnO 2 battery in which both the zinc negative electrode and the manganese dioxide positive electrodes undergo conversion reactions, the …
Two types of solid solution are known in the cathode material of the lithium-ion battery. One type is that two end members are electroactive, such as LiCo x Ni 1−x O 2, which is a solid solution …
This study reports the phase transformation behaviour associated with electrolytic manganese dioxide (EMD) utilized as the positive electrode active material for …
The proposed iodine electrode is substantially promising for the design of future high energy density aqueous batteries, as validated by the zinc-iodine full battery and the...
To establish good and homogeneous electronic contact, a graphite rod was incorporated into the middle of MnO 2 core (see Figure 8 B) and serves as the battery''s …
As a result of the superior battery performance, the high safety of aqueous electrolyte, the facile cell assembly and the cost benefit of the source materials, this zinc …
The intercalation mechanism of zinc ions into α-MnO2 during discharge involves a reversible phase transition of MnO2 from tunneled to layered polymorphs by electrochemical …
Unlike the alkaline electrolytes, a neutral flow system can effectively avoid the zinc dendrite issues. As a result, a Zn–Mn flow battery demonstrated a CE of 99% and an EE …