Nano-sized SiOx/C composite anode for lithium ion batteries

Wang, Jing; Zhao, Hailei; He, Jingliang; Wang, Chunmei; Wang, Jie

doi:10.1016/j.jpowsour.2011.01.053

Cited by 196 publications

(132 citation statements)

References 18 publications

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“…This result could be attributed to the stable SiO 2 /C network structure because the amorphous SiO 2 within the composite nanofiber structure reduced to Li 2 O and Li 4 SiO 4 in the initial lithiation process, which could help buffer the volume change caused by the alloying of Si nanoparticles with Li, and thereby increasing the cycling stability by minimizing the pulverization of the active Si material and the loss of electrical contact between Si nanoparticles and the carbon nanofiber matrix. 32,42 From Figure 9, it was also seen that the cycling performance of CVD carbon-coated Si/SiO 2 /C nanofibers was even better than that of Si/SiO 2 /C nanofibers. The capacity retention and coulombic efficiency of CVD carbon-coated Si/SiO 2 /C nanofibers was 91% and 97.4%, respectively, at the 50th cycle.…”

Section: Resultsmentioning

confidence: 99%

Carbon-Confined PVA-Derived Silicon/Silica/Carbon Nanofiber Composites as Anode for Lithium-Ion Batteries

Dirican

Yanılmaz

et al. 2014

J. Electrochem. Soc.

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Novel silicon/silica/carbon (Si/SiO 2 /C) composite nanofibers were synthesized by electrospinning and subsequent heat-treatment of a mixture of Si nanoparticles, sol-gel tetraethyl orthosilicate solution, and aqueous polyvinyl alcohol solution. These Si/SiO 2 /C nanofiber composites were also coated with amorphous carbon by chemical vapor deposition (CVD) technique. The CVD carboncoated nanofiber composites formed freestanding, conductive nonwoven mats that were used directly as binder-free anodes in lithium-ion batteries. Results indicated that the SiO 2 component of the composite anodes provided sufficient buffer function to accommodate the volume expansion of the Si nanoparticles and the CVD amorphous carbon coating helped maintain the Si nanoparticles within the carbon nanofiber matrix during repetitive charging and discharging processes. Electrochemical performance tests showed that the capacity retention of CVD carbon-coated Si/SiO 2 /C nanofiber composites was greater than 91% and the corresponding coulombic efficiency was 97.4% at the 50th cycle. Electrochemical energy storage has been demonstrated as one of the most promising technologies for different applications such as grid storage, electric vehicles, and portable electronic devices.1-3 Because of their superior properties, including high energy density, good cycle life and good power performance, lithium-ion batteries are considered as the most preferred rechargeable battery technology in recent years.4-6 The development of high-capacity electrode materials for high-energy lithium-ion batteries is critically important for technological improvements on portable electronics and electric vehicles that use lithium-ion batteries as the power source. 7,8 Current commercial lithium-ion batteries use graphitic materials in the anode. However, graphitic anode materials cannot meet the capacity requirements of future portable electronics because of their low specific capacity of 372 mAh g −1 . 7,9,10 Lithium storage capacities of alloy-type anodes, such as silicon (Si), tin, germanium, etc., are much higher than that of commercially-used intercalation-type graphite anodes. Among all alloy-type anodes, Si has the highest theoretical capacity of 4200 mAh g −1 , making it the best candidate for next-generation high-energy lithium-ion batteries.11-13 However, the insertion of lithium ions into Si during cycling induces large volumetric change (up to 400%), which causes intense pulverization of active Si material, loss of electrical contact between Si and carbon conductor, and unstable solid electrolyte interphase (SEI) formation on the Si surface.14-16 These drawbacks bring together the performance degradation of active Si material during repetitive lithiation and de-lithiation processes. 17,18 To eliminate the aforementioned drawbacks, Si-based composite anodes have been widely investigated. Among them, Si/carbon (Si/C) composites have drawn great attention, which can potentially combine the advantageous properties of Si (high capacity) and C (excellent electr...

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Section: Resultsmentioning

confidence: 99%

Carbon-Confined PVA-Derived Silicon/Silica/Carbon Nanofiber Composites as Anode for Lithium-Ion Batteries

Dirican

Yanılmaz

et al. 2014

J. Electrochem. Soc.

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“…There are no sharp peaks in the XRD spectrum, indicating the amorphous nature of the sample. A weak and broad peak in the range of 20-35°is identified as a non-crystalline phase of SiO 2 [19], while the peak for amorphous carbon is hardly detected at 43° [20]. Coarse particles with a size of 100 lm order are observed in the SEM image inset in Fig.…”

Section: Electrochemical Measurementsmentioning

confidence: 92%

Preparation and characterization of SiO2/C nanocomposites by a combination of mechanochemical-assisted sol–gel and dry ball milling processes

Molkenova

Taniguchi

2015

Advanced Powder Technology

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“…Li 4 SiO 4 compounds are irreversibly formed in SiObased electrodes during lithiation processes. [6][7][8]12,13 On the other hand, it is known that Li 4 SiO 4 compounds can ease the volume change of the SiO-C electrode during charge/discharge processes. In this case, the theoretical coulombic efficiency is 74%.…”

Section: ¹2mentioning

confidence: 99%

“…1 In recent years, many researchers have focused on the development of SiO-based anode materials. [2][3][4][5][6][7][8][9][10][11][12][13] We have reported that SiO-C electrodes containing a small amount of A-Fe 2 O 3 fine powder as conversion electrodes exhibited high capacity (ca. 1300 mAh g ¹1 ) and good performance as compared with SiO-C electrodes.…”

Section: Introductionmentioning

confidence: 99%

Characteristics of High-capacity SiO-C Anodes Containing Olivine-type LiMgPO<sub>4</sub> Compounds for Lithium Secondary Batteries

2015

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The anode properties of carbon-coated SiO (SiO-C) electrode materials containing a small amount of olivine-type LiMgPO 4 powder as the additive were investigated in a lithium cell. The 2 wt% LiMgPO 4 (LMP)-containing SiO-C anode exhibited a high charge/discharge capacity of 1500 mAh g −1 (versus SiO) and good cycle performance. In addition, the high-rate discharge performance was improved by the addition of LMP. The thermal stability of the electrode material was studied by differential scanning calorimetry (DSC). The thermal stability of the SiO-C anode material was improved by the addition of LMP powder.

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Nano-sized SiOx/C composite anode for lithium ion batteries

Cited by 196 publications

References 18 publications

Carbon-Confined PVA-Derived Silicon/Silica/Carbon Nanofiber Composites as Anode for Lithium-Ion Batteries

Carbon-Confined PVA-Derived Silicon/Silica/Carbon Nanofiber Composites as Anode for Lithium-Ion Batteries

Preparation and characterization of SiO2/C nanocomposites by a combination of mechanochemical-assisted sol–gel and dry ball milling processes

Characteristics of High-capacity SiO-C Anodes Containing Olivine-type LiMgPO<sub>4</sub> Compounds for Lithium Secondary Batteries

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