Fabrication of high-performance silicon anode materials for lithium-ion batteries by the impurity compensation doping method

Liu, Yang; Su, Zhiqin; Wang, Yong; Shui, Jiaxin; Jin, Zhengfei; Bai, Bing; Qiu, Linlin; Du, Pingfan

doi:10.1007/s10008-023-05401-4

Cited by 10 publications

(2 citation statements)

References 36 publications

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“…This is because the volume expansion of the impurity doped silicon can be better accommodated by increasing electronic conductivity and lithium ion diffusion coefficient [47]. Moreover, in contrast to the lithium ion de-embedding process that takes place in the surface layer of pristine Si, the deeper lithium ion de-embedding process occurs in B-doped Si, which can reduce the stress changes on the electrode surface to further suppress the effect of Si volume expansion and enhance the stability of the electrode structure [48]. All the above results of good rate capability, high reversible capacity, and CE achieved in LIBs demonstrate that the B doping of SiNWs not only enhances the conductivity of SiNWs but also contributes to the stable and fast Li + /electron transport during the charge-discharge process.…”

Section: Resultsmentioning

confidence: 99%

Binder-free boron-doped Si nanowires toward the enhancement of lithium-ion capacitor

Song

Yang

et al. 2023

Nanotechnology

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AbstractLithium-ion capacitors (LICs) are next-generation electrochemical storage devices that combine the benefits of both supercapacitors and lithium-ion batteries. Silicon materials have attracted attention for the development of high-performance LICs owing to their high theoretical capacity and low delithiation potential (~0.5 V vs. Li/Li+). However, sluggish ion diffusion has severely restricted the development of LICs. Herein, a binder-free anode of boron-doped silicon nanowires (B-doped SiNWs) on a copper substrate was reported as an anode for LICs. B-doping could significantly improve the conductivity of the SiNW anode, which could enhance electron/ion transfer in LICs. As expected, the B-doped SiNWs//Li half-cell delivered a higher initial discharge capacity of 454 mAh g−1 with excellent cycle stability (capacity retention of 96% after 100 cycles). Furthermore, the near-lithium reaction plateau of Si endows the LICs with a high voltage window (1.5-4.2V), and the as-fabricated B-doped SiNWs//AC LIC possesses the maximum energy density value of 155.8 Wh kg−1) at a battery-inaccessible power density of 275W kg−1. This study provides a new strategy for using Si-based composites to develop high-performance LIC. 

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Section: Resultsmentioning

confidence: 99%

Binder-free boron-doped Si nanowires toward the enhancement of lithium-ion capacitor

Song

Yang

et al. 2023

Nanotechnology

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“…However, their limited interstitial sites result in low capacity, about 200~300 mAh g −1 . The growing demand for high-performance SIBs is driving the development of advanced anodes with long life, high reversible capacity, and excellent rate performance [ 13 , 14 ].…”

Section: Introductionmentioning

confidence: 99%

Bismuth-Antimony Alloy Nanoparticles Embedded in 3D Hierarchical Porous Carbon Skeleton Film for Superior Sodium Storage

Wang,

Lin,

et al. 2023

Molecules

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A composite film that features bismuth–antimony alloy nanoparticles uniformly embedded in a 3D hierarchical porous carbon skeleton is synthesized by the polyacrylonitrile-spreading method. The dissolved polystyrene is used as a soft template. The average diameter of the bismuth–antimony alloy nanoparticles is ~34.5 nm. The content of the Bi-Sb alloy has an impact on the electrochemical performance of the composite film. When the content of the bismuth–antimony alloy is 45.27%, the reversible capacity and cycling stability of the composite film are the best. Importantly, the composite film outperforms the bismuth–antimony alloy nanoparticles embedded in dense carbon film and the cube carbon nanobox in terms of specific capacity, cycling stability, and rate capability. The composite film can provide a discharge capacity of 322 mAh g−1 after 500 cycles at 0.5 A g−1, 292 mAh g−1 after 500 cycles at 1 A g−1, and 185 mAh g−1 after 2000 cycles at 10 A g−1. The carbon film prepared by the spreading method presents a unique integrated composite structure that significantly improves the structural stability and electronic conductivity of Bi-Sb alloy nanoparticles. The 3D hierarchical porous carbon skeleton structure further enhances electrolyte accessibility, promotes Na+ transport, increases reaction kinetics, and buffers internal stress.

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Experimental evaluation of energy efficiency and structural efficiency of ultra-thin carbon fiber composite structural battery tube

Zhang

Wang

Liang

et al. 2023

J Solid State Electrochem

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Fabrication of high-performance silicon anode materials for lithium-ion batteries by the impurity compensation doping method

Cited by 10 publications

References 36 publications

Binder-free boron-doped Si nanowires toward the enhancement of lithium-ion capacitor

Binder-free boron-doped Si nanowires toward the enhancement of lithium-ion capacitor

Bismuth-Antimony Alloy Nanoparticles Embedded in 3D Hierarchical Porous Carbon Skeleton Film for Superior Sodium Storage

Experimental evaluation of energy efficiency and structural efficiency of ultra-thin carbon fiber composite structural battery tube

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