Densities of methanol+trimethyl phosphate binary mixtures from (293.15 to 333.15)K and viscosities of trimethyl phosphate from (283.15 to 373.15)K

Densities of methanol＋trimethyl phosphate binary mixtures were measured over a temperature range of （293.15 to 333.15）K at atmospheric pressure. From these data, excess molar volume（VE） was calculated. Viscosities of trimethyl phosphate were also measured over a temperature range of （283.15 to 373.15）K and the data were fitted to the Andrade equation. The density data were fitted to a second-order polynomial. The excess molar volumes were fitted to the Redlich-Kister equation using a nonlinear regression method. Results show that the density and viscosity gradually decreases with the increase of temperature.

Trimethyl phosphate-enhanced polyvinyl carbonate polymer electrolyte with improved interfacial stability for solid-state lithium battery

The polyvinyl carbonate(PVC)polymer solid electrolyte can be in-situ generated in the assembled lithium-ion battery(LIBs);however,its rigid characteristic leads to uneven interface contact between electrolyte and electrodes.In this work,trimethyl phosphate(TMP)is introduced into the precursor solution for in-situ generation of flexible PVC solid electrolyte to improve the interfacial contact of elec-trolyte and electrodes together with ionic conductivity.The PVC-TMP electrolyte exhibits good interface compatibility with the lithium metal anode,and the lithium symmetric battery based on PVC-TMP electrolyte shows no obvious polarization within 1000 h cycle.As a consequence,the initial interfacial resistance of battery greatly decreases from 278Ω(LiFePO_(4)(LFP)/PVC/Li)to 93Ω(LFP/PVC-TMP/Li)at 50℃,leading to an improved cycling stability of the LFP/PVC-TMP/Li battery.Such in-situ preparation of solid electrolyte within the battery is demonstrated to be very significant for commercial application.

Electrolyte and interphase engineering through solvation structure regulation for stable lithium metal batteries

Lithium metal batteries(LMBs)are considered to be one of the most promising high-energy-density battery systems.However,their practical application in carbonate electrolytes is hampered by lithium dendrite growth,resulting in short cycle life.Herein,an electrolyte regulation strategy is developed to improve the cyclability of LMBs in carbonate electrolytes by introducing LiNO3 using trimethyl phosphate with a slightly higher donor number compared to NO_(3)^(-)as a solubilizer.This not only allows the formaion of Li^(+)-coordinated NO3 but also achieves the regulation of electrolyte solvation structures,leading to the formation of robust and ion-conductive solid-electrolyte interphase films with inorganic-rich inner and organic-rich outer layers on the Li metal anodes.As a result,high Coulombic efficiency of 99.1%and stable plating/stripping cycling of Li metal anode in LilCu cells were realized.Furthermore,excellent performance was also demonstrated in Li||LiNi_(0.83)Co_(0.11)Mn_(0.06)O_(2)(NCM83)full cells and Cul/NCM83 anodefree cells using high mass-loading cathodes.This work provides a simple interphase engineering strategy through regulating the electrolyte solvation structures for high-energy-density LMBs.