Highly Lithiophilic Copper-Reinforced Scaffold Enables Stable Li Metal Anode

Zhao, Xiaoyu; Xia, Shuixin; Zhang, Xun; Pang, Yuepeng; Xu, Fen; Yang, Jing; Sun, Lixian; Zheng, Shiyou

doi:10.1021/acsami.1c04735

Cited by 26 publications

(17 citation statements)

References 61 publications

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“…It is noteworthy that the performance of cycle stability is more than 3000 h at a 1.0 mA cm –2 current density and a 1.0 mA h cm –2 capacity, superior to the Cu foil electrode and some 3D current collector electrodes previously reported (Figure ). − As shown in Figure a–c, the performances of long-term stability for most of the reported 3D current collectors were usually measured at the test time below 2000 h, which is inferior to that of our 3D CSCC. Figure S9 magnifies the voltage profiles of the 10th, 50th, 100th, and 200th circles of the cells to observe changes in voltage profiles in detail.…”

Section: Resultsmentioning

confidence: 68%

Uniform Deposition of Li-Metal Anodes Guided by 3D Current Collectors with In Situ Modification of the Lithiophilic Matrix

Sun

Yang

Bian

et al. 2021

ACS Appl. Mater. Interfaces

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The lithium (Li)-metal anode is deemed as the “holy gray” of the next-generation Li-metal system because of its high theoretical specific capacity, minimal energy density, and lowest standard electrode potential. Nevertheless, its commercial application has been limited by the large volume variation during charge and discharge, the unstable interface between the Li metal and electrolyte, and uneven deposition of Li. Herein, we present a 3D host (Cu) with lithiophilic matrix (CuO and SnO2) in situ modification via a facile ammonia oxidation method to serve as a current collector for the Li-metal anode. The 3D Cu host embellished by CuO and SnO2 is abbreviated as 3D CSCC. By increasing interfacial activity, lowering the nucleation barrier, and accommodating changes in volume of the Li metal, the 3D CSCC electrode effectively demonstrates a homogeneous and dendrite-free deposition morphology with an excellent cycling performance up to 3000 h at a 1.0 mA cm–2 current density. Additionally, the full cells paired with Li@3D CSCC anodes and LiCoO2 cathodes show good capacity retention performance at 0.2 C.

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Section: Resultsmentioning

confidence: 68%

Uniform Deposition of Li-Metal Anodes Guided by 3D Current Collectors with In Situ Modification of the Lithiophilic Matrix

Sun

Yang

Bian

et al. 2021

ACS Appl. Mater. Interfaces

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“…2j, the XPS results were used to validate the structural composition of the CLCS. The common graphic N (399.31 eV), pyrrolic N (399.31 eV), pyridinic N (398.75 eV), and notably the Cu-N site (398.21 eV) are observed in the N 1s spectrum of the CLCS [40][41][42][43]. The isolated Raman spectrum of the CLCS displays a high degree of graphitization (Fig.…”

Section: Preparation and Characterizations Of Clcsmentioning

confidence: 98%

Dendrite-Free and Stable Lithium Metal Battery Achieved by a Model of Stepwise Lithium Deposition and Stripping

Liu

Wang

et al. 2021

Nano-Micro Lett.

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Highlights A facile method is adopted to obtain cucumber-like lithiophilic composite skeleton. Massive lithiophilic sites in cucumber-like lithiophilic composite skeleton can promote and guide uniform Li depositions. A unique model of stepwise Li deposition and stripping is determined. Abstract The uncontrolled formation of lithium (Li) dendrites and the unnecessary consumption of electrolyte during the Li plating/stripping process have been major obstacles in developing safe and stable Li metal batteries. Herein, we report a cucumber-like lithiophilic composite skeleton (CLCS) fabricated through a facile oxidation-immersion-reduction method. The stepwise Li deposition and stripping, determined using in situ Raman spectra during the galvanostatic Li charging/discharging process, promote the formation of a dendrite-free Li metal anode. Furthermore, numerous pyridinic N, pyrrolic N, and CuxN sites with excellent lithiophilicity work synergistically to distribute Li ions and suppress the formation of Li dendrites. Owing to these advantages, cells based on CLCS exhibit a high Coulombic efficiency of 97.3% for 700 cycles and an improved lifespan of 2000 h for symmetric cells. The full cells assembled with LiFePO4 (LFP), SeS2 cathodes and CLCS@Li anodes demonstrate high capacities of 110.1 mAh g−1 after 600 cycles at 0.2 A g−1 in CLCS@Li|LFP and 491.8 mAh g−1 after 500 cycles at 1 A g−1 in CLCS@Li|SeS2. The unique design of CLCS may accelerate the application of Li metal anodes in commercial Li metal batteries.

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“…As a result of their high electronic conductivities, perfect chemical stabilities, and large specific surface areas (SSAs), carbon materials on zinc surfaces can uniformly distribute charge and regulate Zn 2+ flux to stabilize Zn anodes. ,,, In the stage of initial nucleation, Zn 2+ prefers to be deposited on substrates with an identical crystal lattice . However, it is difficult for Zn 2+ to uniformly nucleate on the surface of carbon on account of the low-lattice-mismatch interface, which results in inevitable dendrite formation. ,, A large number of reports about 3D carbon frameworks with lithiophilic metal-based nanoparticles (such as Ag, Cu, Sn, Co) can effectively guide metal ion homogeneous deposition . Wang’s group reported that copper promotes zinc nucleation by forming zincophilic Cu–Zn solid solutions .…”

Section: Introductionmentioning

confidence: 99%

Copper Nanoparticle-Modified Carbon Nanofiber for Seeded Zinc Deposition Enables Stable Zn Metal Anode

Yang

et al. 2022

ACS Sustainable Chem. Eng.

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Challenges with the Zn anode for aqueous zinc ion batteries have hindered their practical applications, such as uncontrollable formation of the Zn dendrite and serious side reactions. Herein, we fabricate a flexible coating layer with porous and conductive carbon networks (Cu@CNFs) by a simple electrospinning method to construct a stable Zn anode. It can uniformly distribute the charge, regulate the Zn 2+ flux, and stabilize the zinc anode. Moreover, the zincopilic Cu nanoparticles (CuNPs) in the coating layer act as nucleation seeds to facilitate the homogeneous deposition of Zn and inhibit its dendrite growth. Density functional theory calculations have further demonstrated the zincophilicity of the CuNPs seeds. As a result, the Cu@CNFs-Zn anode demonstrates a lower nucleation overpotential (58.3 mV at 5.0 mA cm −2 ) and a higher Coulombic efficiency compared with bare Zn and CNFs-Zn anodes. Remarkably, the Cu@CNFs-Zn anode can provide a stable cycle over 2200 h at 1.0 mA cm −2 with a capacity of 1.0 mAh cm −2 . Moreover, the Cu@CNFs-Zn//V 2 O 5 battery achieves a superior cyclability up to 1000 cycles at 0.5A g −1 , which is attributed to the large surface areas of CNFs and the zincophilicity of the Cu@CNFs coating.

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Highly Lithiophilic Copper-Reinforced Scaffold Enables Stable Li Metal Anode

Cited by 26 publications

References 61 publications

Uniform Deposition of Li-Metal Anodes Guided by 3D Current Collectors with In Situ Modification of the Lithiophilic Matrix

Uniform Deposition of Li-Metal Anodes Guided by 3D Current Collectors with In Situ Modification of the Lithiophilic Matrix

Dendrite-Free and Stable Lithium Metal Battery Achieved by a Model of Stepwise Lithium Deposition and Stripping

Copper Nanoparticle-Modified Carbon Nanofiber for Seeded Zinc Deposition Enables Stable Zn Metal Anode

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