Rational Design of Silicon Nanodots/Carbon Anodes by Partial Oxidization Strategy with High-Performance Lithium-Ion Storage

Abstract

Silicon (Si) is considered a promising anode material for rechargeable lithium-ion batteries (LIBs) due to its high theoretical capacity, low working potential, and safety features. However, the practical use of Si-based anodes is hampered by their huge volume expansion during the process of lithiation/delithiation, and they have relatively low intrinsic electronic conductivity, therefore seriously restricting their application in energy storage. Here, we propose a facile approach to directly transform siliceous biomass (bamboo leaves) into a porous carbon skeleton-wrapped Si nanodot architecture through a partial oxidization strategy and magnesium thermal reaction to obtain a high Si nanodot component composite (denoted as Si/C–O). With the synergistic effect of the porous carbon skeleton structure and uniformly dispersed Si nanodots, the Si/C–O composite anode with a stable structure that can avoid pulverization and accommodate volume expansion during cycling is fabricated. As expected, the biomass-converted Si/C–O anode not only presents a high Si component (59.7 wt %) by TGA but also exhibits an excellent capacity of 1013 mAh g–1 at 0.5 A g–1 and robust cycling stability with a capacity retention of 526 mAh g–1 after 650 cycles. Moreover, the Si/C–O anode demonstrates considerable performance in practical LIBs when assembled with a commercial LiNi0.8Co0.1Mn0.1O2 cathode. This work provides an effective strategy and long-term insights into the utilization of porous Si-based materials converted by biomass to design and synthesize high-performance LIB materials.

ZnS/SnS2 Heterostructures Encapsulated in N-Doped Carbon Nanofibers for High-Performance Alkali Metal-Ion Batteries

“…The charge and discharge curves of the precycled LiFePO 4 cathode and ZnS/SnS 2 @NCNFs anode in half cells are presented in Figure S28a,b (Supporting Information). Typical charge and discharge curves for full cells at a current density of 0.1 A g –1 show a voltage ranging from 1.0 to 4.0 V, as shown in Figure b Figure c depicts the rate performance of the full cell.…”

“…Typical charge and discharge curves for full cells at a current density of 0.1 A g −1 show a voltage ranging from 1.0 to 4.0 V, as shown in Figure 8b. 57 Figure 8c depicts the rate performance of the full cell. The reversible capacities of 118, 82, 63, 43, 30, and 19 mA h g −1 are obtained under current densities of 0.1, 0.2, 0.5, 1.0, 2.0, and 5.0 A g −1 , respectively.…”

Highly Ordered Silicon/Carbon Composite Materials Based on Biomass and Their Application in Lithium Batteries

“…Under the influence of extrusion, collision, internal collision and internal corrosion, the shell breaks, leading to the leakage of corrosive electrolyte, causing personal injury or environmental pollution events. The electrolyte leakage accidents are occur in the recycling and recycling of waste lithium batteries [3] .…”

“…For this department, the workers must pay more attention to the research and analysis of equipment, achieve the research goalindependent development, reduce the import cost. Since high-performance lithium-ion batteries are still in the development stage, it is necessary to ensure their quality, performance and safety before they are formally used [3] .…”

Review of the Real-Time Monitoring Technologies for Lithium Dendrites in Lithium-Ion Batteries

“…Lithium-ion batteries (LIBs) possess the merit of high energy density and have been commonly applied in various energy storage devices [1][2][3][4][5], whereas their life and safety performance cannot meet demands, which is not conducive to their further development [6,7]. The growth of lithium dendrites on the anode surface is the cause of short life and poor safety [8][9][10].…”