Recycling Waste Al–Si Alloy for Micrometer-Sized Spongy Si with High Areal/Volumetric Capacity and Stability in Lithium-Ion Batteries

Cao, Li; Xiao, Rongshi; Wang, Jingbo; Li, Songyuan; Xu, Jingwei; Huang, Ting

doi:10.1021/acssuschemeng.2c01144

Cited by 8 publications

(4 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recovery of this waste into valuable materials is important to efficiently utilize resources and protect the environment. The transformation of kerf loss Si waste into Si anodes is an attractive approach with high economic profit [4][5][6][7]. Benefiting from an intrinsic tens-of-nanometers-scale thickness, Si waste-derived anodes can demonstrate a high-rate capacity and high cycling stability [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Controlling Oxidation of Kerf Loss Silicon Waste Enabling Stable Battery Anode

Jiang,

He,

et al. 2024

Processes

View full text Add to dashboard Cite

The recovery of massive kerf loss silicon waste into silicon anodes is an attractive approach to efficiently utilizing resources and protect the environment. Tens-of-nanometers-scale-thickness Si waste particles enable the high feasibility of high-rate Li-ion storage, but continuous oxidation leads to a gradual loss of electrochemical activity. Understanding the relationship between this oxidation and Li-ion storage properties is key to efficiently recovering silicon wastes into silicon anodes. However, corresponding research is rare. Herein, a series of silicon waste samples with different oxidation states were synthesized and their Li-ion storage characters were investigated. By analyzing their Li-ion storage properties and kinetics, we found that oxidation has absolutely detrimental effects on Li-ion storage performance, which is different to previously reported results of nano-silicon materials. The 2.5 wt.% Si provides a substantial initial discharge capacity of 3519 mAh/g at 0.5 A/g. The capacity retention of 2.5 wt.% Si is almost 70% after 500 cycles at 1 A/g. However, the 35.8 wt.% Si presents a modest initial discharge capacity of merely 170 mAh/g. Additionally, oxidation leads the Li-ion storage kinetics to transform from Li-ion diffusion-controlled to charge transfer-controlled behaviors. For kerf loss silicon waste with an oxygen content over 35.8 wt.%, Li-ion storage capability is lost due to a high charge transfer resistance and a low Li-ion diffusion coefficient.

show abstract

Section: Introductionmentioning

confidence: 99%

Controlling Oxidation of Kerf Loss Silicon Waste Enabling Stable Battery Anode

Jiang,

He,

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

“…[5,6] Nevertheless, under the condition of high mass loading required in practice, nano-Si anode shows significant stress DOI: 10.1002/smll.202305265 concentration, which degrades cycling performance. [7] The uneven distribution of agglomerated Si nanoparticles and extrusion caused by volume expansion are the primary causes of locally increased stress. [8] Si nanoparticles are connected with binders in terms of mechanical adhesive strength, which is commonly lower than 10 MPa.…”

Section: Introductionmentioning

confidence: 99%

Stress Mitigation of Nanosilicon Anode to Achieve Energy‐Dense and Highly‐Stable Full Cell

Cao,

Zheng,

Dong

et al. 2023

Small

Self Cite

View full text Add to dashboard Cite

Nanosilicon (nano‐Si) anode is subjected to significant stress concentration, which is caused by extrusion deformation of expanded Si nanoparticles with uneven distribution. The low‐strength binder and adhesive interface are unable to withstand the stress, resulting in exfoliation and impeding the use of nano‐Si anodes. This work aims to mitigate stress in a Si anode with flexible copper (Cu) skeletons that are metallurgically bonded to uniformly distributed Si nanoparticles. It is worth noting that the proposed porous Si‐Cu anode exhibits improved high‐load cycling performance and promising potential in the full cell, with an energy density of 463 Wh kg−1 at 0.5 C and retention of 81% after 500 cycles at 2 C. Chemo‐mechanical simulation and in (ex) situ observation demonstrate that expansion stress is reduced and more evenly distributed in the anode due to uniform distribution of Si nanoparticles, flexible Cu skeletons, and adequate pores. More importantly, the stress is primarily distributed in the flexible Cu skeletons and bonding interface, preventing anode exfoliation, and ensuring efficient lithium ion/electron transference. This work sheds light on the structure construction of an alloy‐type anode.

show abstract

“…Li-ion batteries (LIBs) are important energy storage devices in a variety of industries [ 1 , 2 ]. Si is a promising anode material for LIBs, with a high theoretical specific capacity of up to 3579 mAh/g [ 3 , 4 ]. However, Si experiences a significant volume expansion (>300%) during charging and discharging, resulting in rapid degradation of battery capacity [ 5 ] and limiting its practical application.…”

Section: Introductionmentioning

confidence: 99%

Effect of Laser-Textured Cu Foil with Deep Ablation on Si Anode Performance in Li-Ion Batteries

Wang,

Cao,

et al. 2023

Nanomaterials

Self Cite

View full text Add to dashboard Cite

Si is a highly promising anode material due to its superior theoretical capacity of up to 3579 mAh/g. However, it is worth noting that Si anodes experience significant volume expansion (>300%) during charging and discharging. Due to the weak adhesion between the anode coating and the smooth Cu foil current collector, the volume-expanded Si anode easily peels off, thus damaging anode cycling performance. In the present study, a femtosecond laser with a wavelength of 515 nm is used to texture Cu foils with a hierarchical microstructure and nanostructure. The peeling and cracking phenomenon in the Si anode are successfully reduced, demonstrating that volume expansion is effectively mitigated, which is attributed to the high specific surface area of the nanostructure and the protection of the deep-ablated microgrooves. Moreover, the hierarchical structure reduces interfacial resistance to promote electron transfer. The Si anode achieves improved cycling stability and rate capability, and the influence of structural features on the aforementioned performance is studied. The Si anode on the 20 μm-thick Cu current collector with a groove density of 75% and a depth of 15 μm exhibits a capacity of 1182 mAh/g after 300 cycles at 1 C and shows a high-rate capacity of 684 mAh/g at 3 C.

show abstract

Recycling Waste Al–Si Alloy for Micrometer-Sized Spongy Si with High Areal/Volumetric Capacity and Stability in Lithium-Ion Batteries

Cited by 8 publications

References 44 publications

Controlling Oxidation of Kerf Loss Silicon Waste Enabling Stable Battery Anode

Controlling Oxidation of Kerf Loss Silicon Waste Enabling Stable Battery Anode

Stress Mitigation of Nanosilicon Anode to Achieve Energy‐Dense and Highly‐Stable Full Cell

Effect of Laser-Textured Cu Foil with Deep Ablation on Si Anode Performance in Li-Ion Batteries

Contact Info

Product

Resources

About