2020
DOI: 10.1007/s12274-020-2962-y
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A combination of hierarchical pore and buffering layer construction for ultrastable nanocluster Si/SiOx anode

Abstract: Porous Si can be synthesized from diverse silica (SiO 2) via magnesiothermic reduction technology and widely employed as potential anode material in lithium ion batteries. However, concerns regarding the influence of residual silicon oxide (SiO x) component on resulted Si anode after reduction are still lacked. In this work, we intentionally fabricate a cauliflower-like silicon/silicon oxide (CF-Si/SiO x) particles from highly porous SiO 2 spheres through insufficient magnesiothermic reduction, where residual … Show more

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Cited by 27 publications
(18 citation statements)
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“…36 Zeng et al prepared an ultrastable Si/SiO x anode via hydrothermal and magnesiothermic reduction methods in which SiO x can prevent the deformation of the electrode structure and restrain the volume expansion of Si in the cycling process, thereby obtaining excellent electrochemical performance. 37 Herein, the silicon/silicon oxide/carbon (Si/SiO x /C) particles anchored on graphene sheets were designed and fabricated as the anode material to improve the performance of LIBs. In this anode material, the Si nanodomains were embedded in the amorphous SiO x and elastic carbon matrix to alleviate the bulk change of Si and obtain the stable electrode structure.…”
Section: ■ Introductionmentioning
confidence: 99%
See 1 more Smart Citation
“…36 Zeng et al prepared an ultrastable Si/SiO x anode via hydrothermal and magnesiothermic reduction methods in which SiO x can prevent the deformation of the electrode structure and restrain the volume expansion of Si in the cycling process, thereby obtaining excellent electrochemical performance. 37 Herein, the silicon/silicon oxide/carbon (Si/SiO x /C) particles anchored on graphene sheets were designed and fabricated as the anode material to improve the performance of LIBs. In this anode material, the Si nanodomains were embedded in the amorphous SiO x and elastic carbon matrix to alleviate the bulk change of Si and obtain the stable electrode structure.…”
Section: ■ Introductionmentioning
confidence: 99%
“…Moreover, SiO x has small volume expansion, and it can form lithium oxide (Li 2 O) and lithium silicate as a buffer medium during the cycling process to relieve the Si volume expansion . Zeng et al prepared an ultrastable Si/SiO x anode via hydrothermal and magnesiothermic reduction methods in which SiO x can prevent the deformation of the electrode structure and restrain the volume expansion of Si in the cycling process, thereby obtaining excellent electrochemical performance …”
Section: Introductionmentioning
confidence: 99%
“…E, Schematic diagram of synthesis of CF‐Si/SiOx. Reproduced with permission 120 . Copyright 2020, Springer Nature.…”
Section: Interface Engineering Strategies Toward Improved Performancementioning
confidence: 99%
“…Porous structure such as macroporous, microporous, and mesoporous materials have also been synthesized and employed as alloy anode to accommodate the volume expansion upon cycling 117–119 . Kang et al fabricated a hierarchical micro/mesoporous cauliflower‐like silicon/silicon oxide (CF‐Si/SiOx) hybrid anode by the magnesiothermic reduction method 120 . The highly porous silica (HP‐SiO 2 ) nanoparticles were synthesized by hydrothermal reaction as precursor, and then the CF‐Si/SiOx was prepared at a magnesiothermic reduction temperature of 700°C (Figure 9E).…”
Section: Interface Engineering Strategies Toward Improved Performancementioning
confidence: 99%
“…Specifically, after carefully evaluating the best results of Si‐based materials in half and full cells reported so far in literature, [ 92–95 ] their prospects can be summarized as follows: I) Si materials with bulk, [ 96–99 ] core–shell, [ 100–106 ] porous, [ 107–111 ] sandwich, [ 112–114 ] and nanowire [ 115–118 ] structures are synthesized through a variety of strategies, such as magnesiothermic reduction, solvothermal, chemical vapor deposition (CVD), and polymerization. In addition to superior half cell performance, their full cells with conventional LFP and LCO cathodes, high capacity NCM and LiNi x Co y Al z O 2 (NCA, x + y + z = 1) cathodes, as well as high voltage LiNi 0.5 Mn 1.5 O 4 (LMNO) cathodes have also been developed to balance their cost, energy densities, and lifetime.…”
Section: Introductionmentioning
confidence: 99%