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Peer-Review Record

Synthesis, Structure and Mg2+ Ionic Conductivity of Isopropylamine Magnesium Borohydride

Inorganics 2023, 11(1), 17;
by Lasse G. Kristensen 1, Mads B. Amdisen 1, Mie Andersen 2 and Torben R. Jensen 1,*
Reviewer 1: Anonymous
Reviewer 2:
Inorganics 2023, 11(1), 17;
Submission received: 18 November 2022 / Revised: 6 December 2022 / Accepted: 15 December 2022 / Published: 30 December 2022
(This article belongs to the Special Issue State-of-the-Art and Progress in Metal-Hydrogen Systems)

Round 1

Reviewer 1 Report

See attached file.

Comments for author File: Comments.pdf

Author Response

See "Response_to_Reviewer_1"

Author Response File: Author Response.pdf

Reviewer 2 Report

To develop rechargeable batteries with better energy density and more sustainable materials than lithium-based batteries, post-Li-ion technologies are being developed. Among them, sodium / magnesium-based batteries are studied. Which, Mg has the advantage of being abundant in the earth’s crust and having better redox potential than its sodium counterpart. However, the development of Mg batteries is slowed by the difficulty of finding proper electrolytes. Therefore, the authors have reported chlorine-free high stable Mg electrolytes. The manuscript is well written and has significant interest to the readers. Some minor comments can be considered before the final acceptance of the work.

·         The key paper on the Li-ion batteries detailing its rational design including electrodes and electrolytes can be referred to in the opening remark of the Li-ion batteries in section 1.

·         Before quickly jumping onto Mg, batteries like Na and redox flow can be touched in a line or two. That is how the developments had been made on battery systems.

·         Unfortunately, inorganic solid compounds with Mg2+ cations have very low ionic conductivities, due to the very sluggish diffusion of divalent Mg2+ in the solid – how to mitigate this?

·         What is the conductivity for the currently stated electrolyte mixture? Maybe a Nyquist plot can give more details.

·         Do the IR spectral bands compliment the XRD results shown in Figure 4? Why Synchrotron?

·         Any plan to use this electrolyte and run CV (cyclic voltammetry) to test its suitable for reversibility and assess its electrochemical stability. It is customary to prove that reversible Mg deposition/stripping is possible and that its use as electrolyte in all-solid-state Mg-ion batteries could be realized. Any comment would benefit the readers.




Author Response

See "Response_to_Reviewer_2"

Author Response File: Author Response.pdf

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