Structural Designs for Accommodating Volume Expansion in Sodium Ion Batteries

Abstract

At the forefront of energy storage field, developing sodium ion batteries (SIBs) has drew a wide concern due to relatively low cost and abundant resource, comparing with lithium ion batteries (LIBs). Serious volume expansion constraints the electrochemical performance of the conversion/alloying materials, despite of their high reversible capacities or theoretical capacities. Here, from the perspective of structural designs, we systematically study four types of routes to accommodate volume expansion. Delicate and peculiar nanostructures based on nanocrystallization engineering are widely focused on, covering nanosheet assembly and nanoarray construction. Robust materials such as carbon‐based materials can be utilized as the buffer matrix, mitigating the mechanical stress during the charge/discharge process. Besides, recent studies have demonstrated void space reservation in nanostructures was also beneficial for adapting to volume changes. Moreover, for conversion materials, numerous works have confirmed the advantageous influence of interlayer spacing regulation. We also explained the superiority and challenges for further giving scope to structural designs. Sketching out the future studies in SIBs, in situ characterizations are supposed to be highlighted, as well as in‐depth researches on the stress evolution caused by volume expansion.

Micromechanism in All-Solid-State Alloy-Metal Batteries: Regulating Homogeneous Lithium Precipitation and Flexible Solid Electrolyte Interphase Evolution

“…Quantitative analyses of the above results elucidate the reiterative rise and fall behaviors of the wrinkling evolution, uncovering the "breathing" phenomena of the Li-In alloying/ dealloying reactions upon cycling. In comparison with the stack deposition and irreversible dissolution of the Li deposits in Li/LGPS system upon cycling, it is believed that this manner of the Li inner accommodation is conducive to inhibiting the dramatic volume expansion 43 and Li dendrite formation to a certain extent. The shrunk shells do not recover to their initial replete state, which is considered as a proper amount of capacity attenuation.…”

Inedible Azo Dyes and Their Analytical Methods in Foodstuffs and Beverages

“…Examples of HPLC chromatographic conditions (stationary phase, mobile phase, flow rate, and detector) for the determination of inedible azo dyes in foodstuffs and beverages are listed in Table 2. In HPLC technique, reversed-phase HPLC with C 18 column is the mostly employed separation mode (66)(67)(68). For lipophilic azo dyes such as Sudan dyes, the solvents of methanol or acetonitrile and water or 0.1% (v/v) formic acid aqueous solution often serve as the mobile phase (66-68).…”

“…Because all the illegal azo dyes have absorption in UV-Vis wavelength range, a UV-Vis detector or DAD are often used in their quantitative analysis (66,69,70). For the current situation of the illegal addition of multiple azo dyes in foods, there is an increasing demand for the simultaneous determination of these dyes.…”

Novel Insights and Perspectives into Weakly Coupled ReS2 toward Emerging Applications

“…Rechargeable batteries have been considered the most promising power sources to relieve the global energy crisis, along with the utilization in portable electronic and electric vehicles. 31 As previously mentioned, the synergy effect between large interlayer spacing (0.62 nm) and extremely weak coupling allows ReS 2 to accelerate the diffusion of alkali metal ions in batteries, giving rise to an enhancement in battery performance. 13,32 Based on this point, our group firstly synthesized the uniform ReS 2 nanowalls on three-dimensional graphene foam (3DGF), exploring its performance as anode for LIBs.…”