Electrochemical Activation, Sintering, and Reconstruction in Energy‐Storage Technologies: Origin, Development, and Prospects

Abstract

Her research interests focus on the design of nano/micromaterials toward energy storage and conversion (i.e., Li-, Na-, and K-ion batteries) application. She joined Prof. Shibing Ni's group at the China Three Gorges University in 2020. Now she works as a lecturer at the College of Materials and Chemical Engineering, and concentrates on the morphological and structural evolution of electrode materials during cycling.

Hierarchical Self-Assembly Strategy for Scalable Synthesis of Li3VO4/N Doped C Nanosheets for High-Rate Li-Ion Storage

“…A slow increase in the capacity during cycling may stem from the electrochemical activation of electrodes with continuous charge/discharge processes. 44 The capacity and cyclability of the LVO@NC NSs electrode at low current densities were also distinctly improved compared to those of the reported LVO/C electrodes (Table 1). Meanwhile, the representative charge/ discharge profiles of the LVO@NC NSs exhibit the highest reproducibility (Figure S8), which suggests the best durability of the LVO@NC NSs in cycling.…”

“…Obviously, except for the initial capacity loss caused by the presence of the SEI film, the LVO@NC NSs electrode presents ultrahigh stability with the highest capacity of 628.4 mAh g –1 at the 300th cycle. A slow increase in the capacity during cycling may stem from the electrochemical activation of electrodes with continuous charge/discharge processes . The capacity and cyclability of the LVO@NC NSs electrode at low current densities were also distinctly improved compared to those of the reported LVO/C electrodes (Table ).…”

“…59 More importantly, the specific primary architecture of the LVO@NC NSs, i.e., ultrasmall LVO nanoparticles integrated in the NC layer (LVO@NC), is self-adaptive in cycling: (1) the LVO nanoparticles could be gradually activated with decreased size, showing enhanced Li + diffusion; 44 (2) the in situ activated LVO could deliver reinforced contact with the NC layer. 8,44 As a result, the excellent charge transport kinetics of the LVO@NC NSs could be obtained and well sustained during charge/discharge processes, leading to the enhanced high-rate and long lifespan Li-ion storage. 60−63 On the basis of the prominent electrochemical performance, the potential prospect application of the LVO@NC NSs was preliminarily assessed.…”

“…In addition, the integral morphology and the microstructure of the LVO@NC NSs endow it with excellent reaction kinetics: (1) the integral 2D morphology facilitates efficient electrolyte permeation and reactions with the active material; (2) the interconnected C network is advantageous for rapid electron transfer; (3) the small LVO particles are beneficial for fast Li + diffusion . More importantly, the specific primary architecture of the LVO@NC NSs, i.e., ultrasmall LVO nanoparticles integrated in the NC layer (LVO@NC), is self-adaptive in cycling: (1) the LVO nanoparticles could be gradually activated with decreased size, showing enhanced Li + diffusion; (2) the in situ activated LVO could deliver reinforced contact with the NC layer. , As a result, the excellent charge transport kinetics of the LVO@NC NSs could be obtained and well sustained during charge/discharge processes, leading to the enhanced high-rate and long lifespan Li-ion storage. − …”

Potentiostatic Reconstruction of Nickel‐Cobalt Hydroxysulfate with Self‐Optimized Structure for Enhancing Energy Storage

“…[1,2] Aqueous hybrid supercapacitors use capacitive materials as the negative electrode and battery-type materials as the positive electrode, combining the fast charging/discharging and long lifespan of capacitive materials with the high capacity of battery-type It should be noted that the reconstruction phenomenon in an electrochemical environment is a common problem prevalent in the field of electrocatalysis and electrochemical energy storage. [19][20][21][22] This reconstruction process is inevitable for TMCs, etc., and can be predicted by thermodynamics, and TMCs actually act as a self-sacrificing precursor. [23,24] TMCs, etc.…”