High surface area nanocrystalline hausmannite synthesized by a solvent-free route

Herrera, Daniel; Ponrouch, Alexandre; Pons, Josefina; Domingo, Concepción; Ayllón, José A.

doi:10.1016/j.materresbull.2012.05.050

Cited by 3 publications

(1 citation statement)

References 56 publications

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“…One potential solution is to reduce the particle size of the cathode material to allow shorter ion diffusion lengths and enhance ingress/egress of Mg 2+ ions by increasing the surface area exposed to the electrolyte. This strategy has been implemented to activate Li + insertion into olivine LiMnPO 4 [ 33,34 ] and to improve the electrochemistry of other Li‐ion [ 35–42 ] as well as Mg electrode materials. [ 43–47 ] Nanomaterials can either be prepared (1) directly through rapid, low‐temperature syntheses that limit the growth of crystallites or (2) by mechanical milling of micron‐sized materials.…”

Section: Introductionmentioning

confidence: 99%

Direct Nano‐Synthesis Methods Notably Benefit Mg‐Battery Cathode Performance

et al. 2020

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Rechargeable magnesium batteries are promising candidates for nextgeneration electrochemical energy storage, but their development is severely hindered by sluggish solid-state diffusion and significant desolvation penalties of the divalent cation. Studies suggest that nano-sized electrode materials alleviate these issues by shortening diffusion lengths and increasing electrode/electrolyte interaction. Here, the effect of particle size and synthetic methodology on the electrochemical performance of four sulfide cathode materials in Mg batteries is investigated: layered TiS 2 , CuS, spinel Ti 2 S 4 , and CuCo 2 S 4 . In these sulfide hosts, the direct preparation of nano-dimensional crystallites is critical to activate or improve electrochemistry. Even promising cathode materials can appear electrochemically inert when micron-sized particles are investigated (e.g., CuCo 2 S 4 ), and mechanical milling leads to surface degradation of active material which severely limits performance. However, nano-sized CuCo 2 S 4 prepared directly reaches a capacity nearly double that of ball-milled material and delivers 350 mAh g −1 at 60 °C. This work provides synthetic considerations which may be crucial in the discovery and design of novel Mg cathode materials, so that promising candidates are not overlooked. By extension, in oxide materials where Mg 2+ diffusion is expected to be much more sluggish, this factor is anticipated to be even more important when screening for new hosts.

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Section: Introductionmentioning

confidence: 99%