A pinecone-inspired nanostructure design for long-cycle and high performance Si anodes

Abstract

A pinecone-like three-dimensional hierarchical heterostructure is designed and it shows great potential for lithium storage.

Yolk–shell-structured Si@TiN nanoparticles for high-performance lithium-ion batteries

“…Besides, Si anodes also suffer from dramatic volume expansion ($300%) upon lithium insertion/extraction, which induces the irreversible pulverization of active particles and the continuous collapse of the solid electrolyte interphase (SEI) lm, leading to the exfoliation of Si electrodes from current collectors, and nally resulting in poor cycling performance. [1][2][3][4][5][6] To tackle the above-mentioned formidable weaknesses, tremendous endeavors have been attempted to enhance the cycling performance of Si electrodes by designing Si alloys (Li-Si and Si-Sb), 7,8 nanosized silicon (nanowires and nanotubes) 9,10 and modifying Si with various conductive media (carbon, metal and conducting polymers). [11][12][13] Among these, a suitable method is to design a special composite structure combining Si with carbon and oxides, such as core-shell and yolk-shell structures, exhibiting the greatly improved electrochemical performance of Si electrodes in a synergistic way.…”

“…Besides, Si anodes also suffer from dramatic volume expansion (∼300%) upon lithium insertion/extraction, which induces the irreversible pulverization of active particles and the continuous collapse of the solid electrolyte interphase (SEI) film, leading to the exfoliation of Si electrodes from current collectors, and finally resulting in poor cycling performance. 1–6…”

Highly Aligned Graphene Oxide for Lithium Storage in Lithium‐Ion Battery Through A Novel Microfluidic Process: The Pulse Freezing

“…For instance, composites assembled using 1D carbon nanofibers were prepared via electrospinning and reached specific capacities of greater than 750 mAh g −1 at 0.1 A g −1 and 700 mAh g −1 at 1 A g −1 with decorations of Si [11] and MoS 2 , [12] respectively. In another case, 3D composites assembled using graphene and carbon nanotubes (CNTs) were prepared and reached a specific capacity of ≈1000 mAh g −1 at low current densities of 0.1 and 0.2 A g −1 , [13][14][15][16][17][18][19][20][21][22][23] and 150 mAh g −1 at a high current density of 3 A g −1 . [24] Physical assemblies such as vacuum alignment of 1D and 2D carbon materials with the presence of metal oxide decorations can also achieve a high capacity of ≈900 mAh g −1 at 0.1 A g −1 current density [25][26][27] without consuming as much energy as CVD.…”

Enhanced electrochemical performance and decreased strain of graphite anode by Li2SiO3 and Li2CO3 co-modifying

“…With the development of advanced lithium-ion batteries, some performances, such as high capacity, good rate performance and long cycle life, are focused for the extensive applications in some fields such as mobile phones, laptops, (hybrid) electric vehicles and other electronic products. [1] As the key anode material for current commercial lithium-ion batteries, graphites, including natural graphite and artificial graphite, have the unique advantages like low charge/discharge voltage platform and lots of raw materials. [2] However, their applications are limited by some issues, such as poor cycling performance, low capacity, large volume change, and possible dendrite formation which could cause short circuit and potential safety hazards.…”