Preparation of nanocrystalline MoSi2 with enhanced lithium storage by sol–gel and carbonthermal reduction method

Xu, Jianguang; Qi, Jin-Shun; Wang, Yu; Luo, Juhua; Yao, Wei

doi:10.1016/j.ceramint.2018.02.167

Cited by 4 publications

(4 citation statements)

References 34 publications

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“…This work further demonstrated that the Li-ion storage potential of inactive transition metal silicides is promising, as reported in our earlier work [ 41 ]. According to Equation (1), assuming TiSi 2 can transform completely to TiSi and SiLi 2.33 , theoretical capacity values of 600 mAh/g can be expected for TiSi 2 .…”

Section: Resultssupporting

confidence: 87%

“…Combination of a relatively high capacity, low volume changes upon cycling and excellent rate capability of TiSi2/RGO hybrid, TiSi2 or other inactive transition metal silicides may become the next anode material to substitute graphite, silicon or lithium titanate, or at least act as high-rate electrode for Li-ion battery and capacitor. This work further demonstrated that the Li-ion storage potential of inactive transition metal silicides is promising, as reported in our earlier work [41]. According to Equation (1), assuming TiSi 2 can transform completely to TiSi and SiLi 2.33 , theoretical capacity values of 600 mAh/g can be expected for TiSi 2 .…”

Section: Resultssupporting

confidence: 86%

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Preparation of TiSi2 Powders with Enhanced Lithium-Ion Storage via Chemical Oven Self-Propagating High-Temperature Synthesis

Jin

Shi

et al. 2021

Nanomaterials

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Although silicon has highest specific capacity as anode for lithium-ion battery (LIB), its large volume change during the charge/discharge process becomes a great inevitable hindrance before commercialization. Metal silicides may be an alternative choice because they have the ability to accommodate the volume change by dispersing Si in the metal matrix as well as very good electrical conductivity. Herein we report on the suitability of lithium-ion uptake in C54 TiSi2 prepared by the “chemical oven” self-propagating high-temperature synthesis from the element reactants, which was known as an inactive metal silicide in lithium-ion storage previously. After being wrapped by graphene, the agglomeration of TiSi2 particles has been efficiently prevented, resulting in an enhanced lithium-ion storage performance when using as an anode for LIB. The as-received TiSi2/RGO hybrid exhibits considerable activities in the reversible lithiation and delithiation process, showing a high reversible capacity of 358 mAh/g at a current density of 50 mA/g. Specially, both TiSi2 and TiSi2/RGO electrodes show a remarkable enhanced electrochemical performance along with the cycle number, indicating the promising potential in lithium-ion storage of this silicide. Ex-situ XRD during charge/discharge process reveals alloying reaction may contribute to the capacity of TiSi2. This work suggests that TiSi2 and other inactive transition metal silicides are potential promising anode materials for Li-ion battery and capacitor.

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Section: Resultssupporting

confidence: 87%

Section: Resultssupporting

confidence: 86%

Preparation of TiSi2 Powders with Enhanced Lithium-Ion Storage via Chemical Oven Self-Propagating High-Temperature Synthesis

Jin

Shi

et al. 2021

Nanomaterials

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“…Compared with the desulfurization product obtained at 900°C, there is no CaO in the product. In addition, SiO 2 and CaO react to generate CaSiO 3 rather than Ca 2 SiO 4 according to reaction (6). First, as can be seen from Figure 3 that when the product is obtained at 900°C, the diffraction peaks of SiS 2 can be observed, which demonstrates that not all the S in MoS 2 is captured by lime.…”

Section: Methodsmentioning

confidence: 97%

“…Since a dense SiO 2 protective film is formed at a temperature higher than 900°C, it can prevent the continued oxidation of MoSi 2 , which results in the high-temperature oxidation resistance of MoSi 2 is comparable to that of silicon-based structural ceramics SiC and Si 3 N 4 . [1][2][3][4][5][6][7][8] In addition, MoSi 2 is mainly used as the electrical heating element of industrial furnace and hightemperature structural material. 1,2 In the past few decades, many methods have been proposed for the preparation of MoSi 2 powder, such as conventional arc melting, self-propagating hightemperature synthesis, [9][10][11] mechanical alloying, 12,13 reduction method, 14,15 and plasma spraying.…”

Section: Introductionmentioning

confidence: 99%

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

2021

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The extraction of metal from sulfide mineral is usually accompanied by the emission of sulfur-containing gas (e.g., SO 2 ), which will cause serious pollution to the environment. In this work, a sulfur-emission free route for preparing ultrafine molybdenum disilicide (MoSi 2 ) powder by silicothermic reduction of MoS 2 with the desulfurization agent of lime was proposed. The internal MoS 2 -Si mixture is wrapped in an external desulfurization layer composed of lime. After the reaction is completed, the prepared MoSi 2 can be easily separated from the desulfurization layer by using a non-chemical method. In addition, when the reaction temperature is higher than 1000°C, almost all S in MoS 2 is transformed to sulfurcontaining gas SiS, which can be fully captured by lime to generate CaS, Si, and CaSiO 3 . For the raw material with a MoS 2 :Si molar ratio of 1:4, after reacting at 1000, 1100, and 1200°C for 2 h, the average grain sizes of the obtained MoSi 2 powder are approximately 100, 300, and 800 nm, respectively. Moreover, when the reaction time is prolonged from 2 to 6 h at 1000°C, the average grain size of the acquired MoSi 2 powder is about 200 nm, and the residual sulfur content is about 0.12%. This work provides a new insight to extract metals or metal compounds from sulfide ores without releasing sulfur-containing gas.

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Spinel (Ni0.4Co0.4Mn0.2)3O4 nanoparticles as conversion-type anodes for Li- and Na-ion batteries

Ren

Zheng

et al. 2019

Ceramics International

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Preparation of nanocrystalline MoSi2 with enhanced lithium storage by sol–gel and carbonthermal reduction method

Cited by 4 publications

References 34 publications

Preparation of TiSi2 Powders with Enhanced Lithium-Ion Storage via Chemical Oven Self-Propagating High-Temperature Synthesis

Preparation of TiSi2 Powders with Enhanced Lithium-Ion Storage via Chemical Oven Self-Propagating High-Temperature Synthesis

A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂

Spinel (Ni0.4Co0.4Mn0.2)3O4 nanoparticles as conversion-type anodes for Li- and Na-ion batteries

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Preparation of nanocrystalline MoSi2 with enhanced lithium storage by sol–gel and carbonthermal reduction method

Cited by 4 publications

References 34 publications

Preparation of TiSi2 Powders with Enhanced Lithium-Ion Storage via Chemical Oven Self-Propagating High-Temperature Synthesis

Preparation of TiSi2 Powders with Enhanced Lithium-Ion Storage via Chemical Oven Self-Propagating High-Temperature Synthesis

A novel sulfur‐emission free route for preparing ultrafine MoSi2 powder by silicothermic reduction of MoS2

Spinel (Ni0.4Co0.4Mn0.2)3O4 nanoparticles as conversion-type anodes for Li- and Na-ion batteries

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A novel sulfur‐emission free route for preparing ultrafine MoSi₂ powder by silicothermic reduction of MoS₂