Rearrangement of Ion Transport Path on Nano-Cross-linker for All-Solid-State Electrolyte with High Room Temperature Ionic Conductivity

Abstract

The low room temperature ionic conductivity (RTσ) of polyethylene oxide (PEO)-based solid-state polymer electrolyte (SPE) severely restricts its application for lithium batteries. Herein, acrylamide (AM) has been introduced into the poly(ethylene glycol) methyl ether methacrylate-poly(ethylene glycol) diacrylate (P-P). The multiple hydrogen bonds of AM expand the original single lithium environmentand Li•••OC), which accelerates the conduction of lithium ions. In addition, the double bond modification of nanosilica (SiO 2 ) not only improves the mechanical properties but also brings a high-speed orderly vehicular transport mechanism. The multiple-lithium-ions environment is rearranged on the surface of the SiO 2 to play a more significant role, making the RTσ of SPE reach 2.6 × 10 −4 S cm −1 , and the Li-ion transfer number reaches 0.84. The results show that the assembled all-solid-state lithium−sulfur battery has a high initial discharge capacity of 707 mAh g −1 at 30 °C when the sulfur loading is 4.3 mg cm −2 , good cycle stability (capacity retention rate of 89% after 100 cycles at 0.1 C), and excellent rate performance. This SPE with high RTσ, stable interface engineering, and broad potential window (5.1 V) is expected to be used in other lithium/lithium-ion batteries that require high-voltage tolerance.

High-Capacitance γ-rGO/MXene Cathode and Rapid Na+-Transfer Dynamics Sodium Titanate Anode for a Quasi-Solid-State Sodium-Ion Capacitor

“…Therefore, we chose acrylate rubber (ACM) with high adhesion as the substrate of QPE and used nanosilica as the reinforcement crosslinker to ameliorate the mechanical strength of ACM. The detailed preparation process of nanosilica is as in our previous report . Subsequently, surface amination modification of SiO 2 was accomplished with 3-aminopropyltriethoxysilane (APES) (Figure a).…”

Integrated Construction Improving Electrochemical Performance of Stretchable Supercapacitors Based on Ant‐Nest Amphiphilic Gel Electrolytes

“…Furthermore, the cross‐linking density of s APU and APU was evaluated by the storage modulus with the formula V e = E /3 RT (Figure 1f, the detailed steps in Supporting Information). [ 36 ] It can be found that the crosslinking density of s APU ( V e = 0.0021) was significantly higher than that of APU ( V e = 0.00038), which is ascribed to the porous structure of s APU with is beneficial to the removal of MEKO capping agent and promotes the reaction between the −NCO groups and the TEOA crosslinking agent.…”

In situ prepared “polymer-in-salt” electrolytes enabling high-voltage lithium metal batteries

“…[1][2][3] PEs are mostly prepared by dissolving lithium salts in the polymer matrix (known as "salt-in-polymer"), which usually suffers from a narrow electrochemical window and low ionic conductivity at room temperature. [4][5][6] On the other hand, the unsatisfactory lithium ion transference number (t Li +) increases the concentration polarization of Li + , which further inhibits the rapid rate of charging/discharging of solid-state batteries. [7][8][9][10] Alternatively, "polymer-in-salt" electrolyte (PISE) where the content of lithium salt exceeds 50 wt% emerge as a promising solution to extend the electrochemical window, achieve high ionic conductivity at room temperature and prevent dendrite growth at lithium metal anodes.…”