Enveloping a Si/N-doped carbon composite in a CNT-reinforced fibrous network as flexible anodes for high performance lithium-ion batteries

Abstract

Due to its highest theoretical capacity and low discharge potential, silicon (Si) is attracting an increasing attention as one of the most promising anodes for lithium ion batteries. However, the...

Structural Control and Optimization Schemes of Silicon‐Based Anode Materials

“…In addition to the improved electrochemical properties, the electrodes also have good potential for making flexible electrodes for LIBs, which can be bent by 180° and still recover well to their original state. [ 102 ]…”

“…In addition to the improved electrochemical properties, the electrodes also have good potential for making flexible electrodes for LIBs, which can be bent by 180°and still recover well to their original state. [102] In commercial manufacturing, electrodes need to be calendered to increase the volumetric capacity of the battery, and the calendering process requires high pressure to be applied to the electrode material, so the material needs to be highly mechanically flexible to avoid damage to the electrode during the calendering process. [103][104][105] To exploit the mechanical properties of carbon nanotubes to increase their use in practical industrial applications, Xuet al obtained a foam-like spherical structure by growing graphene and carbon nanotubes in situ around Si particles.…”

Recent achievements of free‐standing material and interface optimization in high‐energy‐density flexible lithium batteries

“…The polymer protective layer via heat treatment was in situ converted into N‐doped carbon layers on the silicon anode surface. [ 57 ] As shown in Figure 4c,d, the porous nanofiber network structure consisting of CNTs and N‐doped carbon layers is helpful to the formation of stable SEI films by improving the conductivity and guarantee the electrode structural integrity. Furthermore, Guo's group creatively constructed the flexible and stretchable interface on the surface of carbon‐coated SiO x particles (SiO x /C) (Figure 4e,f).…”

“…Reproduced with permission: Copyright 2021, Royal Society of Chemistry. [ 57 ] (e) and (f) Schematic illustration of C‐SiO x /C anode structure change during cycling and electrochemical stability of LiNi 0.6 Co 0.2 Mn0 .2 O 2 full cells with different anodes. Reproduced with permission: Copyright 2020, Elsevier.…”

Self-templating synthesis of heteroatom-doped large-scalable carbon anodes for high-performance lithium-ion batteries

“…However, its low theoretical specific capacity (372 mA h g −1 ) cannot meet the rapidly increasing demand for electric vehicles in the vastly emerging market in recent years. 18–23 For large-scale commercial electricity storage, therefore, the performance capability, electrode durability and safety perspective need to be further improved. 24–26 As such, it is urgent to design novel anode materials that possess high theoretical capacities with excellent cycling and rate performance for advanced LIBs.…”