Spatially heterogeneous carbon-fiber papers as surface dendrite-free current collectors for lithium deposition

Ji, Xiulei; Liu, Deyu; Prendiville, D. G.; Zhang, Yichi; Liu, Xiaonao; Stucky, Galen D.

doi:10.1016/j.nantod.2011.11.002

Cited by 158 publications

(105 citation statements)

References 51 publications

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“…The current collector is not just a substrate to increase the conductivity for electrodes; a good design of it enables favorable control of lithium dendrites even when the cell is cycled at high current density [189]. Chung and Manthiram [190] have employed nano-cellular carbon (NC) as the current collector for sulfur cathodes.…”

Section: Current Collectorsmentioning

confidence: 99%

Recent advances in lithium–sulfur batteries

Chen

Shaw

2014

Journal of Power Sources

386

261

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Section: Current Collectorsmentioning

confidence: 99%

Recent advances in lithium–sulfur batteries

Chen

Shaw

2014

Journal of Power Sources

386

261

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“…One optimized strategy is to coat an electrically insulating surface (such as SiO 2 and SiC) onto the carbon nanofibers to form spatially heterogeneous carbon fiber papers, which prevents direct lithium deposition on the insulating electrolyte-facing surface and accommodates lithium deposition inside the spacious voids. [17] Although high Li deposition rates were achieved, it remained challenging to improve the long-term reversibility of Li metal anode due to its relatively low Coulombic efficiency of 94%. Another efficient strategy is to place a 3D oxidized polyacrylonitrile nanofiber network on top of the current collector.…”

Section: Carbon Nanofibers For LI Metal Anodesmentioning

confidence: 99%

Advanced Porous Carbon Materials for High‐Efficient Lithium Metal Anodes

Xin

Yin

et al. 2017

Advanced Energy Materials

222

163

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choices for the next-generation energy storage devices because of their surpassed energy output. [3] However, the inherent defects of Li anode incur serious problems that restrict the utilization of rechargeable Li metal batteries. [4] First, an uneven plating/stripping of Li leads to the formation and growth of Li dendrites. The formed Li dendrites may puncture the separator and induce internal short circuit, bring severe safety concerns. Second, Li has a relatively high Fermi energy and thus easily reacts with the liquid electrolyte to form an unstable solid-electrolyte interphase (SEI) on the anode surface. The persistent reaction between Li metal and electrolyte consumes both of them, and results in a low Coulombic efficiency and rapid capacity fade of anode. Third, the plating of Li is actually a "hostless" process. Therefore, the relative change of volume for Li metal anode is virtually infinite, which may induce immense internal stress fluctuation of battery and account for seriously deteriorated performance.Great efforts have been devoted to addressing the above problems of Li anode. A number of works focus on optimizing the electrolyte components and additives to homogenize the Li + flux for plating and improve the stability and uniformity of the SEI on the anode surface. [5] However, the resultant SEI layer has been revealed not sufficiently sturdy to accommodate the morphological change of the Li anode surface, and can be broken down upon repeated Li plating/stripping. [6] Therefore, solid electrolytes and various mechanical barriers with high shear modulus have been explored to suppress dendrite formation. [7] Given the simple physical blocking function of the mechanical barrier, these strategies do not alter the fundamental chemical/ electrochemical properties of Li and thereby show a limited dendrite-proof effect. Furthermore, most solid electrolytes show low ionic conductivity and critical interfacial issues in their contacts with both electrodes. Recently, the development of a threedimensional (3D) porous current collector has been considered as a feasible route to prohibit the growth of Li dendrite. [8] The 3D interconnected architectures provide a large specific surface area, enabling low current density and uniform distribution of the positive charges, while the porous structure ensures ample space to accommodate Li, limiting the growth of Li dendrite and alleviating the huge volume change of Li metal during cycling. For example, 3D porous copper current collector consisting of a large number of protuberant tips has been regarded Metallic lithium is considered as a competitive anode candidate for rechargeable Li batteries due to its ultrahigh theoretical specific capacity of 3860 mA h g −1 . However, hurdles regarding the uneven Li deposition, unstable solid electrolyte interphase formation, and infinite change of relative dimensions challenge its practical application. Porous carbons (PCs), due to their high conductivity and stable electrochemistry, have been demonstrated feasible as ho...

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“…CFP has been utilized for the fabrication of large load-bearing composites due to its tensile strength, stiffness, and low density. 44,45 CFP is a promising current collector and a backbone for conformal coating of transition metal oxides for sensors without using any insulating binders. 46 Individual carbon fibers in the CFP are well-connected and the conductive network and pore channels create an efficient electron percolation path as well as enable electrolyte access to the electrochemically active nanomaterials without limiting charge transport.…”

Section: Introductionmentioning

confidence: 99%

Highly active 3-dimensional cobalt oxide nanostructures on the flexible carbon substrates for enzymeless glucose sensing

Kannan

Maiyalagan

Marsili

et al. 2017

Analyst

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The demand for electrochemical sensors with high sensitivity and reliability, fast response, and excellent selectivity has stimulated intensive research on developing highly active nanomaterials. In this work, freestanding 3D/Co 3 O 4 thorn-like and wire-like (nanowires) nanostructures are directly grown on a flexible carbon fiber paper (CFP) substrate by a single-step hydrothermal process without using surfactants or templates. The 3D/Co 3 O 4 thorn-like nanostructures show higher electrochemical activity than wire-like because of their high conductivity, large specific surface areas, and mesopores on their surface. The characterization of 3D/Co 3 O 4 nanostructures is performed by using high resolution transmission electron microscopy (HRTEM), field emission scanning electron microscopy (FESEM), X-ray photoelectron spec-

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Spatially heterogeneous carbon-fiber papers as surface dendrite-free current collectors for lithium deposition

Cited by 158 publications

References 51 publications

Recent advances in lithium–sulfur batteries

Recent advances in lithium–sulfur batteries

Advanced Porous Carbon Materials for High‐Efficient Lithium Metal Anodes

Highly active 3-dimensional cobalt oxide nanostructures on the flexible carbon substrates for enzymeless glucose sensing

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