Intercalation behavior of a manganese dioxide with zion ion
- Intercalation behavior of a manganese dioxide with zion ion
- 이종혁; 주제백; 오시형
- beyond lithium ion; zinc ion; manganese dioxide
- Issue Date
- Beyond Lithium Ion VI
- Recently, there have been growing interests in developing new energy storage systems
based on abundant multivalent cations such as Mg2+, Al3+, Pb2+ and Zn2+ as a charge transport
carrier since Mg-ion cells consisting of Mo6O8 Chevrel phase cathode and high energy density
Mg metal anode was reported to offer an theoretical energy density (135 Wh kg-1) comparable to
that of Ni/MH battery system without a noticeable degradation for thousands of cycles. Ideally,
these systems are suitable for a medium- or large-scale energy storage device for such as a loadleveling
of intermittent renewable energy sources and an emergency backup power of green
buildings since these are considered to be potentially manufactured much more economically
with a competitive energy density than Li-ion batteries. In practice, however, the development of
these systems is often interrupted by the lack of reversible electrode materials with reversible
intercalation mechanism of charge carriers and the slow progress in choosing a proper electrolyte
system. Most of all, multiple ionic charges which each cation carries undoubtedly increase the
electrostatic interaction of the cation with its surroundings, leading to poor intercalation kinetics.
The common approach for mitigating these interactions so far includes nano-sizing of the
electrode materials which shortens the diffusion path of the multi-charged cations, partial
shielding of cationic charge by adding small amount of polar molecules and use of a material
with a large tunnel size or slap distance minimizing the steric hindrance.
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