Construction of an Additional Hierarchical Porous Framework in Carbon Fabric for Applications in Energy Storage

Abstract

A gradient copolymer, poly(styrene-co-vinylbenzyl), was synthesized and used to construct a porous conductive framework on carbon fabric (C porous @CF). Compared with the pristine CF, C porous @CF exhibited a smaller average pore size (from greater than 10 to 1−2 μm), a greatly expanded surface area (from 2.2 to 55 m 2 g −1 ), an improved connection between carbon fibers, and better electronic conduction. The prepared C porous @CF was tested as a conductive host for the cathode active material in lithium−polysulfide batteries. The cell constructed with C porous @CF had a higher capacity (>1000 mAh g −1 at 0.1−0.5C) and better rate capability compared to that constructed with pristine CF. The primary causes of the improved electrochemical performance of the C porous @CF cell are discussed and clarified through cyclic voltammetry and the method of the galvanostatic intermittent titration technique.

Enhancing Li+ transport efficiency in solid-state Li-ion batteries with a ceramic-array-based composite electrolyte

“…S13 and S14, ESI†), and the D Li + values were calculated using eqn (4). 62 where τ is the duration of the current pulse (s), nm is the molar number of the cathode active material (mol), V m is the molar volume of the electrode, S is the contact area between the electrode and electrolyte, Δ E s is the steady-state voltage change due to the current pulse, and Δ E t is the voltage change during the constant current pulse. The resulting D Li + values of the two batteries during charge and discharge processes are compared in Table 2.…”

Functional Textiles with Smart Properties: Their Fabrications and Sustainable Applications

“…The resulting porous fabric exhibited a greatly expanded surface area, an improved connection between fabric fibers, and better electronic conduction, showing potential utilization as cathode active materials for electrochemical reactions. [75] Despite these efforts for polymer-functionalized textiles, thick coating layer and intrinsic shortcomings of polymers might have an adverse effect on the wearability (e.g., breathability, comfortness, softness or biocompatibility), reliability, and productivity. It is necessary to improve the functionalized materials for the trade-off between the inherent properties and the new special performance of the textiles.…”