Bimodal Porous Carbon-Silica Nanocomposites for Li-Ion Batteries

Zhe Qiang, Xinye Liu, Feng Zou, Kevin A. Cavicchi, Yu Zhu, Bryan Vogt

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

Bimodal porous carbon-silica (BP-CS) nanocomposites exhibit advantageous properties from a design perspective for low-cost lithium-ion battery anodes. The BP-CS nanocomposites were fabricated using cooperative self-assembly of phenolic resin, tetraethylorthosilicate, and Pluronic F127 via a scalable roll-to-roll method. An etching reaction between molten KOH and silica at high temperature (∼700 °C) introduces micropores and increases the surface area from 446 m 2 /g to 1718 m 2 /g without the loss of the ordered mesostructure. This large surface area after etching is generally advantageous for electrochemical energy storage. The carbon framework not only provides electrical conductivity but also constrains the volumetric changes of SiO 2 during Li + insertion and extraction to improve the capacity stability on charge-discharge cycling. The bimodal pores of BP-CS facilitate lithium-ion diffusion (mesopores) while maximizing the contact area between the electrolyte and electrode (micropores) as well as providing stress relief from Li + insertion. These characteristics lead to a discharge capacity of 611 mAh g -1 after 200 cycles at 200 mA g -1 with over 99.5% Coulombic efficiency for all discharge cycles. Even when increasing the current rate to 3 A g -1 , a capacity of 313 mAh g -1 is retained after 1500 cycles, corresponding to <0.005% fade in the capacity per cycle. The combination of a high rate performance, a good cycle stability at a high rate, and a scalable synthesis route with low-cost precursors makes BP-CS a promising inexpensive, carbon/SiO 2 -based anode material for long lifetime batteries.

Original languageEnglish (US)
Pages (from-to)16702-16709
Number of pages8
JournalJournal of Physical Chemistry C
Volume121
Issue number31
DOIs
StatePublished - Aug 10 2017

Fingerprint

Silicon Dioxide
electric batteries
Nanocomposites
nanocomposites
Carbon
Silica
silicon dioxide
cycles
carbon
ions
UCON 50-HB-5100
insertion
Etching
Anodes
anodes
lithium
etching
phenolic resins
Poloxamer
Stress relief

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Energy(all)
  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films

Cite this

Qiang, Zhe ; Liu, Xinye ; Zou, Feng ; Cavicchi, Kevin A. ; Zhu, Yu ; Vogt, Bryan. / Bimodal Porous Carbon-Silica Nanocomposites for Li-Ion Batteries. In: Journal of Physical Chemistry C. 2017 ; Vol. 121, No. 31. pp. 16702-16709.
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abstract = "Bimodal porous carbon-silica (BP-CS) nanocomposites exhibit advantageous properties from a design perspective for low-cost lithium-ion battery anodes. The BP-CS nanocomposites were fabricated using cooperative self-assembly of phenolic resin, tetraethylorthosilicate, and Pluronic F127 via a scalable roll-to-roll method. An etching reaction between molten KOH and silica at high temperature (∼700 °C) introduces micropores and increases the surface area from 446 m 2 /g to 1718 m 2 /g without the loss of the ordered mesostructure. This large surface area after etching is generally advantageous for electrochemical energy storage. The carbon framework not only provides electrical conductivity but also constrains the volumetric changes of SiO 2 during Li + insertion and extraction to improve the capacity stability on charge-discharge cycling. The bimodal pores of BP-CS facilitate lithium-ion diffusion (mesopores) while maximizing the contact area between the electrolyte and electrode (micropores) as well as providing stress relief from Li + insertion. These characteristics lead to a discharge capacity of 611 mAh g -1 after 200 cycles at 200 mA g -1 with over 99.5{\%} Coulombic efficiency for all discharge cycles. Even when increasing the current rate to 3 A g -1 , a capacity of 313 mAh g -1 is retained after 1500 cycles, corresponding to <0.005{\%} fade in the capacity per cycle. The combination of a high rate performance, a good cycle stability at a high rate, and a scalable synthesis route with low-cost precursors makes BP-CS a promising inexpensive, carbon/SiO 2 -based anode material for long lifetime batteries.",
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Bimodal Porous Carbon-Silica Nanocomposites for Li-Ion Batteries. / Qiang, Zhe; Liu, Xinye; Zou, Feng; Cavicchi, Kevin A.; Zhu, Yu; Vogt, Bryan.

In: Journal of Physical Chemistry C, Vol. 121, No. 31, 10.08.2017, p. 16702-16709.

Research output: Contribution to journalArticle

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T1 - Bimodal Porous Carbon-Silica Nanocomposites for Li-Ion Batteries

AU - Qiang, Zhe

AU - Liu, Xinye

AU - Zou, Feng

AU - Cavicchi, Kevin A.

AU - Zhu, Yu

AU - Vogt, Bryan

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AB - Bimodal porous carbon-silica (BP-CS) nanocomposites exhibit advantageous properties from a design perspective for low-cost lithium-ion battery anodes. The BP-CS nanocomposites were fabricated using cooperative self-assembly of phenolic resin, tetraethylorthosilicate, and Pluronic F127 via a scalable roll-to-roll method. An etching reaction between molten KOH and silica at high temperature (∼700 °C) introduces micropores and increases the surface area from 446 m 2 /g to 1718 m 2 /g without the loss of the ordered mesostructure. This large surface area after etching is generally advantageous for electrochemical energy storage. The carbon framework not only provides electrical conductivity but also constrains the volumetric changes of SiO 2 during Li + insertion and extraction to improve the capacity stability on charge-discharge cycling. The bimodal pores of BP-CS facilitate lithium-ion diffusion (mesopores) while maximizing the contact area between the electrolyte and electrode (micropores) as well as providing stress relief from Li + insertion. These characteristics lead to a discharge capacity of 611 mAh g -1 after 200 cycles at 200 mA g -1 with over 99.5% Coulombic efficiency for all discharge cycles. Even when increasing the current rate to 3 A g -1 , a capacity of 313 mAh g -1 is retained after 1500 cycles, corresponding to <0.005% fade in the capacity per cycle. The combination of a high rate performance, a good cycle stability at a high rate, and a scalable synthesis route with low-cost precursors makes BP-CS a promising inexpensive, carbon/SiO 2 -based anode material for long lifetime batteries.

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