Self-standing mesoporous Si films as anodes for lithium-ion microbatteries

Silicon carbide (SiC) derived from agricultural waste potentially competitive with silicon anodes

“…This allows the conclusion (disregarding mechanical property issues) that, due to the required ≈40–60% void space needed in a host material, the actual capacity of a realistic Si-based anode would be half of 3579 or 1300 mA h g −1 at best. A recent study reported mesoporous Si films made from wafer sawed single crystals showing specific capacities of 1200 mA h g −1 for 450 cycles 96 offering justification for our estimate. Additionally, SiC could eliminate surface protection needed for Si-based anodes in part as well.…”

DLP printing of a flexible micropattern Si/PEDOT:PSS/PEG electrode for lithium-ion batteries

“…Si cores with a hollow shell, porous shell, and solid shell, nanostructured Si embedded into a porous and elastic matrix, and free-standing Si-based composite film anodes have been designed and investigated. 6 With the goal of maximizing energy storage, while minimizing the weight of the battery, it is imperative to develop methods to quickly design, fabricate, and manufacture batteries of any desired shape. 7…”

Stress Mitigation of Nanosilicon Anode to Achieve Energy‐Dense and Highly‐Stable Full Cell

“…Compared to previously reported nano‐Si anodes (Table S1, Supporting Information), ICE is obviously improved due to the small surface area of the precipitated Si particles by decreasing irreversible capacity loss of side reactions. [ 33 ] As current rates increase from 0.1 C to 3 C, the capacity attenuates gradually, which is primarily affected by the low intrinsic conductivity of Si, and the transferring efficiency of electron/lithium ion in the anode. By constructing the conductive Cu networks to promote electron transfer and the pores to accelerate lithium ion diffusion in the Si‐Cu anode, the capacities of 1106, 806, and 522 mAh g −1 are achieved at high rates of 1 C, 2 C, and 3 C severally, which are higher than that of commercial graphite (Figure S10, Supporting Information) and previously reported nano‐Si anodes (Table S1, Supporting Information).…”