Conductive porous carbon film as a lithium metal storage medium

Kang, Hee Kook; Woo, Soo-Dong; Kim, Jae‐Hun; Lee, Seong Rae; Kim, Young Jun

doi:10.1016/j.electacta.2015.06.140

Cited by 63 publications

(38 citation statements)

References 33 publications

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“…3G). The identified peaks are indexed as Li 21 Si 5 and Li, confirming the entrapment of Li inside the scaffold. The absence of graphitic carbon signals confirms the amorphous phase of the electrospun carbon fiber.…”

Section: Resultsmentioning

confidence: 93%

“…Thus, the whole electrode suffers from a virtually infinite volume change (ratio of Li metal volume at completely charged state versus at the completely discharged state is infinite) compared with the finite volume expansion of several common anodes for lithium ion batteries such as Si (∼400%) (6) and graphite (∼10%) (19). As a result, the mechanical instability induced by the virtually infinite volumetric change would cause a floating electrode/separator interface as well as an internal stress fluctuation (21). However, little attention has been paid to the volume fluctuation problem of the "hostless" Li.…”

mentioning

confidence: 99%

“…These electrolyte additives interact with Li quickly and create a protective layer on the Li metal surface, which helps reinforce the SEI (13-17). Furthermore, recent study in our group has also shown the employment of interconnected hollow carbon spheres (18) and hexagonal boron nitride (19) as mechanically and chemically stable artificial SEI which effectively block Li dendrite growth.In addition to the notorious Li dendrite formation, another significant factor that contributes considerably to the battery shortcircuiting is the volume change of Li metal during electrochemical cycling, which is usually overlooked (20,21). During battery cycling, Li metal is deposited/stripped without a host material.…”

mentioning

confidence: 99%

“…In addition to the notorious Li dendrite formation, another significant factor that contributes considerably to the battery shortcircuiting is the volume change of Li metal during electrochemical cycling, which is usually overlooked (20,21). During battery cycling, Li metal is deposited/stripped without a host material.…”

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confidence: 99%

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Composite lithium metal anode by melt infusion of lithium into a 3D conducting scaffold with lithiophilic coating

Liang

Lin

Zhao

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

788

533

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Lithium metal-based battery is considered one of the best energy storage systems due to its high theoretical capacity and lowest anode potential of all. However, dendritic growth and virtually relative infinity volume change during long-term cycling often lead to severe safety hazards and catastrophic failure. Here, a stable lithium-scaffold composite electrode is developed by lithium melt infusion into a 3D porous carbon matrix with "lithiophilic" coating. Lithium is uniformly entrapped on the matrix surface and in the 3D structure. The resulting composite electrode possesses a high conductive surface area and excellent structural stability upon galvanostatic cycling. We showed stable cycling of this composite electrode with small Li plating/stripping overpotential (<90 mV) at a high current density of 3 mA/cm 2 over 80 cycles.Li composite | Li metal anode | melt infusion | 3D scaffold | lithiophilic N owadays the increasing demand for portable electronic devices as well as electric vehicles raises an urgent need for high energy density batteries. Lithium (Li) metal anode has long been regarded as the "Holy Grail" of battery technologies, due to its light weight (0.53 g/cm 3 ) (1), lowest anode potential (−3.04 V vs. the standard hydrogen electrode) (1), and high specific capacity (3,860 mAh/g vs. 372 mAh/g for conventional graphite anode) (1). It possesses an even higher theoretical capacity than the recently intensely researched anodes such as Ge, Sn, and Si (2-10). In addition, the demand for copper current collectors (9 g/cm 3 ) in conventional batteries with graphite anodes can be eliminated by employment of Li metal anodes, hence reducing the total cell weight dramatically. Therefore, Li metal could be a favorable candidate to be used in highly promising, next-generation energy storage systems such as Li−sulfur battery and Li−air battery.The safety hazard associated with Li metal batteries, originating from the uncontrolled dendrite formation, has become a hurdle against the practical realization of Li metal-based batteries (11,12). The sharp Li filaments can pierce through the separator with increasing cycle time, thus provoking internal short-circuiting (12). Most previous academic research to settle this bottleneck focuses on solid electrolyte interphase (SEI) stabilization/modification by introducing various additives (13-17). These electrolyte additives interact with Li quickly and create a protective layer on the Li metal surface, which helps reinforce the SEI (13-17). Furthermore, recent study in our group has also shown the employment of interconnected hollow carbon spheres (18) and hexagonal boron nitride (19) as mechanically and chemically stable artificial SEI which effectively block Li dendrite growth.In addition to the notorious Li dendrite formation, another significant factor that contributes considerably to the battery shortcircuiting is the volume change of Li metal during electrochemical cycling, which is usually overlooked (20,21). During battery cycling, Li metal is deposited/stripped ...

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Section: Resultsmentioning

confidence: 93%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Composite lithium metal anode by melt infusion of lithium into a 3D conducting scaffold with lithiophilic coating

Liang

Lin

Zhao

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

788

533

View full text Add to dashboard Cite

show abstract

“…One of the strategies to tackle these issues is to introduce matrix structures for Li metal storage. Several matrixes such as SiC coated carbon paper, 17 interconnected hallow carbon nanospheres, 18 fibrous Li 7 B 6 , 19 TiO 2 nanotube 20 and conductive porous carbon 21 were examined in organic electrolytes so far. In this study, the deposition and dissolution of Li on a Cu modified with a carbon fiber composite as a matrix of deposited Li were investigated in the LiTFSA-G4 solvate ionic liquid.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Deposition and Dissolution of Lithium on a Carbon Fiber Composite Electrode in a Solvate Ionic Liquid

et al. 2017

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Electrochemical deposition and dissolution of Li metal on a carbon fiber composite electrode were investigated in lithium bis(trifluoromethylsulfonyl)amide-tetraglyme solvate ionic liquid electrolyte. The carbon fiber composite coated on a Cu substrate was composed of vapor-grown carbon fiber (VGCF ® -H) and poly(vinylidene fluoride). The coulombic efficiency for dissolution of Li deposits on the VGCF ® -H modified Cu electrode was kept more than 98% at 100th cycle and higher than that on a Cu electrode in the solvate ionic liquid. Li was deposited in the porous structure of the VGCF ® -H modified Cu electrode and scarcely observed on the surface of the VGCF ® -H modified Cu probably because the overpotential for the reduction of Li is smaller on the Cu substrate and/or deposited Li than that on the cylindrical basal plane of VGCF ® -H. This result suggests that the voids in the carbon fiber network effectively act as the Li deposition sites at the electrode|separator interface in the coin cell.

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Lithium Metal Anode

Liu

Yang

Lü

2019

Encyclopedia of Inorganic and Bioinorganic Chemistry

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Lithium metal batteries (LMBs) are among the most sought‐after battery chemistries for high‐energy storage devices. However, LMBs always undergo uncontrollable lithium deposition, relatively lower Coulombic efficiency (CE), severe side reactions, and limited power output, which impede their practical applications. In the last 40 years, numerous efforts have been made to solve these issues, ranging from theoretically modeling the lithium dendrite growth behavior to experimentally modifying the lithium metal anode. This article provides an overview of LMBs and its main challenge—dendritic lithium growth. First, the advantages and disadvantages of LMBs are discussed compared with the state‐of‐the‐art lithium‐ion batteries, in which the lithium dendrite growth and fast CE decay are extensively considered. Specific characterization techniques are also summarized to understand the growing behavior of dendritic lithium and anode surface chemistry. To understand the fading mechanisms of LMBs, numerous models and hypotheses are carried out to predict the solid electrolyte interphase (SEI) formation, ionic electromigration, and finally dendritic growth behavior. From the insights of the abovementioned theoretical basis, methods concerning on suppressing lithium dendrites and improving the cell CE are categorized as the electrolyte additives, structural electrolyte development, new battery operation mode, multidimensional composite electrode design, and so on. Finally, future directions are given that are expected to drive progress in the development of LMBs.

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Conductive porous carbon film as a lithium metal storage medium

Cited by 63 publications

References 33 publications

Composite lithium metal anode by melt infusion of lithium into a 3D conducting scaffold with lithiophilic coating

Composite lithium metal anode by melt infusion of lithium into a 3D conducting scaffold with lithiophilic coating

Electrochemical Deposition and Dissolution of Lithium on a Carbon Fiber Composite Electrode in a Solvate Ionic Liquid

Lithium Metal Anode

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