Improvement of cycle behaviour of SiO/C anode composite by thermochemically generated Li4SiO4 inert phase for lithium batteries

Veluchamy, A.; Doh, Chil‐Hoon; Kim, Dong-Hun; Lee, Jung-Hun; Lee, Duck-Jun; Ha, Kyung-Hwa; Shin, Hyeon–Ok; Jin, Bong‐Soo; Kim, Hyunsoo; Moon, Seong‐In; Park, Cheol-Wan

doi:10.1016/j.jpowsour.2008.11.137

Cited by 81 publications

(44 citation statements)

References 12 publications

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“…6 shows the charge-discharge profiles of the a-Si@SiOx/Cr/C in the first three cycles at a current density of 100 mA g À1 . The first discharge curve of the a-Si@SiO x /Cr/C presents typical characteristics of the SiO-based composite [15,20]. The first discharge capacity is about 1235 mAh g À1 with a coulombic efficiency of about 61%.…”

Section: Resultsmentioning

confidence: 90%

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Amorphous-silicon@silicon oxide/chromium/carbon as an anode for lithium-ion batteries with excellent cyclic stability

Feng

et al. 2015

Electrochimica Acta

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Section: Resultsmentioning

confidence: 90%

“…As an alternative to nanosilicon, SiO has attracted many researchers' interest [12][13][14][15][16][17][18][19]. At a high temperature, SiO can be disproportionated and the formed nanosilicon particles are surrounded by amorphous SiO x (0 < x 2) [20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Amorphous-silicon@silicon oxide/chromium/carbon as an anode for lithium-ion batteries with excellent cyclic stability

Feng

et al. 2015

Electrochimica Acta

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“…With help of X-ray diffraction analysis, they could confirm the presence of Li 4 SiO 4 . A quarter of the SiO was reduced to Li 4 SiO 4 , which resulted in a smaller irreversible capacity (Coulombic efficiency rise of ≈11%) and improved capacity retention after 100 cycles but also in a lower reversible capacity, as Li 4 SiO 4 acts as an electrochemically inactive species [51].…”

Section: Concepts For Chemical Lithiation Using Active Reactantsmentioning

confidence: 99%

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

et al. 2018

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Abstract:In order to meet the sophisticated demands for large-scale applications such as electro-mobility, next generation energy storage technologies require advanced electrode active materials with enhanced gravimetric and volumetric capacities to achieve increased gravimetric energy and volumetric energy densities. However, most of these materials suffer from high 1st cycle active lithium losses, e.g., caused by solid electrolyte interphase (SEI) formation, which in turn hinder their broad commercial use so far. In general, the loss of active lithium permanently decreases the available energy by the consumption of lithium from the positive electrode material. Pre-lithiation is considered as a highly appealing technique to compensate for active lithium losses and, therefore, to increase the practical energy density. Various pre-lithiation techniques have been evaluated so far, including electrochemical and chemical pre-lithiation, pre-lithiation with the help of additives or the pre-lithiation by direct contact to lithium metal. In this review article, we will give a comprehensive overview about the various concepts for pre lithiation and controversially discuss their advantages and challenges. Furthermore, we will critically discuss possible effects on the cell performance and stability and assess the techniques with regard to their possible commercial exploration.

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“…It has been previously shown that SiO x phases can react with Li þ to form Li 2 stabilize Si-based anode structures, though at reduced capacities. 24,25 The presence of irreversible side reactions can be quantified through measurements of coulombic efficiency, which is the ratio of lithiation capacity to delithiation capacity during a cycle. The value for our nanopillar Si electrodes is typically around 80% on the first cycle.…”

Section: Voltage Versus Capacitymentioning

confidence: 99%

Silicon nanopillar anodes for lithium-ion batteries using nanoimprint lithography with flexible molds

Mills

Cannarella

Zhang

et al. 2014

Journal of Vacuum Science &Amp; Technology B, Nanotechnology and Microelectronics: Materials, Processing, Measurement, and Phen

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The lithium ion battery, a preferred energy storage technology, is limited by its volumetric and gravimetric energy densities, as well as its capacity retention with prolonged cycling. In this work, the authors exploited the extremely high lithium storage capacity of Si as an anode material and tackled the issue of lithium-induced volume expansion by patterning the Si into a nanopillar array using nanoimprint lithography and reactive-ion etching. Arrays of 200 nm-pitch Si pillars of 50–70 nm diameter and 200–500 nm height were fabricated on stainless steel substrates, assembled into coin cells, and tested against lithium counter electrodes. Initial charge capacities in excess of 3000 mAh/g, and a low rate-dependence, were obtained with these Si pillar anodes. This represents an improvement over previously reported nanoimprint-patterned Si anodes. Though this initial capacity is roughly equivalent to previously reported values for bulk Si anodes, our nanopillar anodes exhibit far superior capacity retention with subsequent charge–discharge cycles.

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Improvement of cycle behaviour of SiO/C anode composite by thermochemically generated Li4SiO4 inert phase for lithium batteries

Cited by 81 publications

References 12 publications

Amorphous-silicon@silicon oxide/chromium/carbon as an anode for lithium-ion batteries with excellent cyclic stability

Amorphous-silicon@silicon oxide/chromium/carbon as an anode for lithium-ion batteries with excellent cyclic stability

Pre-Lithiation Strategies for Rechargeable Energy Storage Technologies: Concepts, Promises and Challenges

Silicon nanopillar anodes for lithium-ion batteries using nanoimprint lithography with flexible molds

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