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Cucumber-Shaped Construction Combining Bismuth Nanoparticles with Carbon Nanofiber Networks as a Binder-Free and Freestanding Anode for Li-Ion Batteries
journal contribution
posted on 2020-06-17, 21:30 authored by Kaixiang Shen, Zishuai Zhang, Shaofeng Wang, Qiang Ru, Lingzhi Zhao, Linfeng Sun, Xianhua Hou, Fuming ChenBismuth
nanoparticles were synthesized in three-dimensional (3D)
network carbon nanofibers by the electrospinning and carbonization
method. The bionic structures with cucumber-shaped carbon nanofibers@Bi
nanoparticles (CCNs@BiNs) have flexibility and a self-supporting backbone,
which can directly be used as anode materials for lithium-ion batteries
(LIBs). The carbon shells that wrap bismuth nanoparticles can effectively
buffer the volume expansion during the lithiation process. Owing to
the special structure and pseudocapacitive effect, the CCNs@BiNs electrodes
can deliver a superb cycling capacity of 322 mAh g–1 at 0.25 A g–1 after 500 cycles. The rate capability
with high recoverability demonstrates a capacity of 450 mAh g–1 when the current density returns to 0.1 A g–1. The binder-free and foldable CCNs@BiNs will have potential for
use in energy storage devices with high demand and requirement of
flexibility and long cycling.
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Freestanding AnodeLIBCCNbionic structurescarbonization methodcarbon shellsBismuth Nanoparticlesdensity returnscycling capacityanode materialsrate capabilitylithiation processflexibilityvolume expansionbismuth nanoparticlespseudocapacitive effectCarbon Nanofiber NetworksLi-Ion Batteries Bismuth nanoparticles500 cyclesCucumber-Shaped Constructionnetwork carbon nanofiberslithium-ion batteriesenergy storage devicesmAh
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