Stable Acetals of Glyoxal as Electrolyte Solvents for Lithium‐Ion Batteries

Abstract

In this manuscript, we report for the first time about the use of the glyoxylic‐acetals‐based electrolytes in combination with graphite electrodes. We showed that these innovative electrolytes display good viscosities and conductivities, as well as higher thermal stability and flash points compared to the electrolyte based on conventional solvents. Additionally, they display intrinsic film‐forming ability and they can be successfully used in combination with graphite electrodes.

Acyclic Acetals in Propylene Carbonate-Based Electrolytes for Advanced and Safer Graphite-Based Lithium Ion Batteries

“…As already reported by Heß et al, the assumed SEI film forming ability of TME and TEE should be included in the consideration. 29 Figure 2 shows the electrochemical response of different solvent ratios of TME:PC (1:x 2 w/w, x 2 = 6, 4, 2, 1.4) in graphite||Li cells. Compositions of 1:6 w/w (TME:PC) and lower lead to PC-exfoliation in the first cycle (see inset Fig.…”

“…They are also promising solvents for electrochemical double-layer capacitors. 28,29 Equally, the solvents are cheap, abundant and easy to synthesize at large scale. 28 However, the low relative permittivity, resulting in a low ionic conductivity has to be improved.…”

Glyoxal‐Based Electrolytes in Combination with Fe2O3@C‐Based Electrodes for Lithium‐Ion Batteries

“…Nonetheless, as already reported, the transport properties of the two glyoxal electrolytes are suitable for their use in LIBs, and both guarantee good performance in a broad range of C‐rates [17b,e] . Not to forget that electrolytes based on TEG display higher thermal stability, lower vapor pressure, and higher boiling points compared to LP30 [17b,d] …”

A Novel Strategy to Enable Effective Use of Dioxolane‐Based Electrolytes in Lithium‐Ion Batteries

“…As discussed in the introduction, the poor stability showed by graphite electrodes when used in combination with etherbased electrolytes represents one of the limitations associated to the use DOL in LIBs [8,16] and low concentration (1 M) electrolyte is reported to provide limited protection on graphite electrodes. [17] On the other hand, it has been shown that graphite alloy and conversion electrodes are working very well in combination with TEG-based electrolytes [18] as they are able to form a stable and homogenous SEI. [19] Figure 2a shows the charge-discharge profile at 0.1 C of graphite cycled in combination with DT2F.…”