Crumpled Graphene Balls Stabilized Dendrite-free Lithium Metal Anodes

Liu, Shan; Wang, Aoxuan; Li, Qianqian; Wu, Jinsong; Chiou, Kevin; Huang, Jiaxing; Luo, Jiayan

doi:10.1016/j.joule.2017.11.004

Cited by 307 publications

(207 citation statements)

References 45 publications

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“…Therefore, reducing local current density by increasing the surface area of current collector is ap opular strategy to suppress Li dendrite. [5] Moreover,c onsiderable approaches have been developed to suppress Li dendrite formation during repeated plating/striping process.T hese include surface protective layer, [6] large area conductive/non-conductive hosts [7] and novel ion refluxing structures. [8] However, the formation and growth mechanisms of Li dendrite are still intricate and obscure due to many factors in the complex battery system.…”

Section: Itiswidely Recognized That Lithium-based Batteries Includingmentioning

confidence: 99%

Temperature‐Dependent Nucleation and Growth of Dendrite‐Free Lithium Metal Anodes

et al. 2019

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It is essential to develop afacile and effective method to enhance the electrochemical performance of lithium metal anodes for building high-energy-density Li-metal based batteries.H erein, we explored the temperature-dependent Li nucleation and growth behavior and constructed ad endritefree Li metal anode by elevating temperature from room temperature (20 8 8C) to 60 8 8C. As eries of ex situ and in situ microscopyi nvestigations demonstrate that increasing Li deposition temperature results in large nuclei size, low nucleation density,a nd compact growth of Li metal. We reveal that the enhanced lithiophilicity and the increased Li-ion diffusion coefficient in aprotic electrolytes at high temperature are essential factors contributing to the dendrite-free Li growth behavior.A sa nodes in both half cells and full cells,t he compact deposited Li with minimized specific surface area delivered high Coulombic efficiencies and long cycling stability at 60 8 8C. Figure 4. a) Coulombic efficiencies of Li plating/striping on Cu at different temperatures. b) The first cycle voltage profiles of Li plating/striping. c) Charge/ discharge voltage profiles of Li jjLi symmetric cells. d) Energy density and energy efficiency of Li jjLTOfull cells at 60 8 8Cand 20 8 8C.

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Section: Itiswidely Recognized That Lithium-based Batteries Includingmentioning

confidence: 99%

Temperature‐Dependent Nucleation and Growth of Dendrite‐Free Lithium Metal Anodes

et al. 2019

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“…When the current collector with a high capacity of 4 mAh cm −2 was fabricated, the pore size of 3DCu@NG was obviously decreased, on account of plenty of metallic Li deposition on the surface of 3DCu@NG (Figure 2f). [43] Thus, the 3DCu@NG could effectually accommodate the volume expansion during plating/stripping processes. Obviously, the Li deposition on 3DCu@NG is homogenous in the thickness direction rather than selective deposition either in bottom or top.…”

Section: Morphology Of LI Metal Deposition On 3dcu@ng and 3dcumentioning

confidence: 99%

“…[37][38][39] Li metal could be restricted in the pores of 3D porous collector, thus suppressing lithium dendrites and adjusting the volume change of Li metal anodes. [42][43][44] In addition, the 3D porous collector affords opportunities for getting high-energy-density lithium metal anodes. [42][43][44] In addition, the 3D porous collector affords opportunities for getting high-energy-density lithium metal anodes.…”

Section: Introductionmentioning

confidence: 99%

N‐Doped Graphene Modified 3D Porous Cu Current Collector toward Microscale Homogeneous Li Deposition for Li Metal Anodes

Zhang

Wen

Wang

et al. 2018

Advanced Energy Materials

165

105

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standard hydrogen electrode). [6][7][8][9][10] Unfortunately, the uneven plating/stripping of Li metal causes uncontrolled Li dendrite growth, which induces a series of problems. First, the continuous growth of Li dendrites may puncture the separator and cause short circuit, consequently resulting in serious safety issues. [11][12][13][14] Second, Li dendrite growth can consume electrolyte and dendritic Li may lose its electronic contact with electrode (called "dead Li") during Li stripping process, accordingly reducing the Coulombic efficiency (CE) and leading to capacity fading. [15][16][17] In addition, different from the other anode materials, the relative volume change of Li metal anodes is infinite due to its "hostless" nature, leading to internal pressure changes and interfacial fluctuations. The solid electrolyte interface (SEI) layer on the surface of the electrodes, which may not accommodate the volume change, will be repeatedly break and form during continuous cycling. [18][19][20] Moreover, the broken SEI will greatly exacerbate the uneven Li electrodeposits nucleate and accelerate the growth of Li dendrites. [21,22] These severe problems impede the practical applications of Li metal anodes and the approach to solve these multifaceted problems would be imperative.To tackle these critical issues, tremendous efforts have been taken to improve the stability of Li metal anodes and the SEI from different perspectives. In order to stabilize the SEI layer, various electrolyte additives, such as Cs + and Rb + ions, LiF, Li 2 S 8 , and LiNO 3 , were used. [23][24][25] Introducing nanoscale interfacial layers has also been intensively investigated (such as interconnected carbon nanospheres [26] and hexagonal boron nitride [27] ), where repeated deposition/stripping of Li under the layers exhibited stable CE. However, the above-mentioned methods based on Li foil (2D Li metal anodes) could not effectually prevent the huge volume change upon stripping/plating of Li metal. Thus, the internal pressure changes and interfacial fluctuations still happened during cycling. [28] To solve this problem, the 3D porous current collectors were used as host structures for Li metal in recent studies, such as 3D porous copper current collectors, [29][30][31][32][33] 3D nickel foam host, [34] and graphene [35,36] electrode. As a major part of Li metal batteries, the current collector has direct influence Lithium metal is the most promising anode material for high-energy-density batteries due to its high specific capacity of 3860 mAh g −1 and low reduction potential of −3.04 V versus standard hydrogen electrode. However, huge volume change, safety concerns, and low efficiency impede the practical applications of Li metal anodes. Herein, it is shown that the nitrogen-doped graphene modified 3D porous Cu (3DCu@NG) current collector can mitigate the above problems. The N-doped graphene, coating on the surface of 3D current collector, not only contributes to a uniform Li + flux, but also leads to a scattered distribution of electrons t...

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“…[ 16–18 ] However, high specific gravity of those hosts (e.g., 8.9 g cm −3 for Cu) compared to that of Li (0.53 g cm −3 ) is the major impediment to achieving satisfactory overall energy density of the electrode. [ 19 ]…”

Section: Introductionmentioning

confidence: 99%

“…[ 21–23 ] For instance, in situ nitrogen‐doped graphitic carbon foams or O‐riched crumpled graphene balls used as current collectors can guide the nucleation of metallic Li and increase the lithium adsorption due to the lithiophilic heteroatom containing functional groups, thus facilitating Li + transfer with no dendrite growth. [ 19 ] 2) Surface modification of carbon hosts for improving lithiophilicity. Various lithiophilic coatings (e.g., Ag nanoparticles, interconnected carbon nanotubes) have been used to improve the interaction between Li ions and lithiophobic carbonaceous materials, which can react with metallic Li or ionic Li with the formation of lithiophilic interface and realize stable Li deposition.…”

Section: Introductionmentioning

confidence: 99%

Regulating Uniform Li Plating/Stripping via Dual‐Conductive Metal‐Organic Frameworks for High‐Rate Lithium Metal Batteries

Wang

Liu

Zhao

et al. 2020

Adv Funct Materials

119

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Lithium metal anodes show immense scope for application in high-energy electronics and electric vehicles. Unfortunately, lithium dendrite growth and volume change leading to short lifespan and safety issues severely limit the feasibility of lithium metal batteries. A rational design of metal-organic framework (MOF)-modified Li metal anode with optimized Li plating/ stripping behavior via one-step carbonization of ZIF-67 is proposed. Experimental and theoretical simulation results reveal that carbonized MOFs with uniformly dispersed Co nanoparticles in N-graphene (Co@N-G) exhibit an electronic/ionic dual-conductivity and significantly improved affinity with Li, and so serve as an ideal host for dendrite-free lithium deposition, consequently leading to uniform lithium plating/stripping during cycling. As a result, the anode delivers highly stable cyclic performance with high coulombic efficiency (CE) at ultrahigh current densities (CE = 91.5% after 130 cycles at 10 mA cm −2 , and CE = 90.4% after 80 cycles at 15 mA cm −2 ). Moreover, the practical applicability and functionality of such anodes are demonstrated through assembly of Li-Co@N-G/NCM full batteries exhibiting a long cycle life of 100 cycles with a high capacity retention of 92% at 1 C.

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Crumpled Graphene Balls Stabilized Dendrite-free Lithium Metal Anodes

Cited by 307 publications

References 45 publications

Temperature‐Dependent Nucleation and Growth of Dendrite‐Free Lithium Metal Anodes

Temperature‐Dependent Nucleation and Growth of Dendrite‐Free Lithium Metal Anodes

N‐Doped Graphene Modified 3D Porous Cu Current Collector toward Microscale Homogeneous Li Deposition for Li Metal Anodes

Regulating Uniform Li Plating/Stripping via Dual‐Conductive Metal‐Organic Frameworks for High‐Rate Lithium Metal Batteries

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