Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 40
·22892-22900
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IF 12.732
Pan Xu,Xin Li,Mei-Yan Yan,Hong-Bin Ni,Hai-Hong Huang,Xiao-Dong Lin,Xiao-Yu Liu,Jing-Min Fan,Ming-Sen Zheng,Ru-Ming Yuan,Quan-Feng Dong
Metallic sodium is considered the most likely anode material to replace metallic lithium owing to its high theoretical capacity, abundant reserves, and low cost. However, the uneven deposition and agglomerate deposition of Na often result in low coulombic efficiency and inferior lifetime during cycling. Here, by phosphorizing treatment, a sodiophilic phosphorized copper mesh (PCM) has been achieved as the metallic sodium-host current collector for the first time; then through in situ electrochemical reaction construct, sodiophilic Na–Cu–P composite layer, which has a fast electronic/ionic conductivity and strong adsorption ability with sodium, thereby greatly mitigating electrodeposition overpotential for improving Na plating/stripping behaviors. Meanwhile, the cross-linked mesh skeleton significantly diminishes the local current density, thus achieving highly reversible Na plating/stripping behavior with dendrite-free and “dead Na”-free. Consequently, the PCM electrode can maintain a high coulombic efficiency (∼99.96%) over 1000 cycles at 5 mA cm−2 and exhibit an ultra-low electrodeposition overpotential from 0.5 mA cm−2 to 10 mA cm−2 in a half-cell. Similarly, the symmetrical cell displays superior cycling stability with low overpotential. Furthermore, the PCM@Na anode delivers excellent cycling/rate performance when paired with Prussian blue (PB) cathode in full-cell.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Pan Xu,Xinyu Hu,Xiaoyu Liu,Xiaodong Lin,Xiaoxiang Fan,Xueyang Cui,Cui Sun,Qihui Wu,Xiaobing Lian,Ruming Yuan,Mingsen Zheng,Quanfeng Dong
ABSTRACT Lithium dendrites, “dead lithium”, infinite volume change and fragile solid electrolyte interphase (SEI) appear indefinitely during Li plating/stripping process, which severely resist the practical application of lithium metal batteries (LMBs). Herein, by a functionalized framework, a phosphorized copper mesh as support skeleton, the lithium plating/stripping has been gridded into zoning effect, thus a desired lithium anode with excellent performance and practical application significance can be achieved. The framework-based lithium anode showed multi-functions with many advantages: enhancing lithium affinity, mitigating volume expansion, improving the current distributions, and inducing uniform deposition of Li + . Thus, a highly reversible and dendrite-free lithium anode under large capacity could be successfully realized, which has been verified by operando optical dynamic test and COMSOL simulation. As expected, symmetric-cell displays low overpotential (~210 mV) at ultra-high current density of 20 mA cm −2 and long lifespan (>1600 h) at ultra-high areal capacity of 50 mAh cm −2 , moreover, full-cell delivers high cycling stability (2 C, 500 cycles) and outstanding rate performance with a lower polarization.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Yuhu Feng,Mengran Lou,Luxiang Wang,Shengjiao Wen,Yang Wang,Ruiying Wang
Transition metal phosphides (TMPs) are often considered as a cost-effective replacement for precious metal catalysts in hydrogen evolution reaction (HER). Herein, the fibers are produced by combining coal with electrospinning technology, and then undergoing a pre-oxidation process for transforming into pre-oxidized coal-based fibers. Subsequently, CuCo-metal organic framework (CuCo-MOF) is grown on the pre-oxidized coal-based fibers using solvothermal method, and the Cu 3 P/Co 2 P/coal-based carbon fibers (Cu 3 P/Co 2 P/C-CFs) composite catalyst is successfully fabricated by phosphating at low temperature and carbonizing at high temperature. The uniformly grown nanoparticles (NPs) on the surface of C-CFs enhance the electrochemically active area, while the electron transfer between Cu 3 P and Co 2 P effectively modulates the electronic structure, increasing the catalytic activity of the catalyst for HER. In addition, the flexible C-CFs not only serve as self-supporting electrode but also effectively inhibit the agglomeration of Cu 3 P/Co 2 P NPs. Remarkably, the overpotential of Cu 3 P/Co 2 P/C-CFs is 83 mV at 10 mA cm −2 current density for HER in 0.5 mol L −1 H 2 SO 4 solution. This study presents promising strategies for the high value-added utilization of coal and the synthesis of highly effective non-precious metal catalysts.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Mengxiao Zhao,Tian Fang,Liping Ni,Yaping Zhu,Ruili Zhang,Ping Chen,Anjian Xie,Yuhua Shen
Copper phosphide has shown remarkable development potential in the anode materials of lithium ion batteries (LIBs) due to its high mass/volume ratio capacity. Nevertheless, the low conductivity and volumetric expansion in the cycling process restrict its practical application. Herein, we ingeniously designed and successfully prepared copper phosphide (Cu 3 P)@carbon (C) nanocomposite with multi-stage pore inverse opals (Cu 3 [email protected] MSPIOs), including possessed the ordered macropores with the mean aperture of ∼100 nm induced by polystyrene (PS) sphere templates and the mesoporous structure with the pore size range of 3.0-9.5 nm and 16–27 nm derived from metal-organic framework (MOF) precursor. Compared to the Cu 3 [email protected] particles prepared without PS sphere templates, the Cu 3 [email protected] MSPIOs as the anode materials demonstrated exceptional lithium storage performance. At a high current density of 2 A g -1 , the discharge specific capacity of Cu 3 [email protected] MSPIOs was 295 mA h g -1 in the 1st cycle while that dropped to 204 mA h g -1 during the 2nd one, and then gradually stabilized. After 1500 cycles, the discharge specific capacity can still reach to 166.3 mA h g -1 , maintaining 81% capacity compared to the 2nd discharge specific capacity, which indicates the Cu 3 [email protected] MSPIOs as the anode material presented good cycling stability. Apparently, the multi-stage pore structure, which can effectively resolve the volumetric change problem during lithium ion (Li + ) intercalation/deintercalation as well as facilitate contact between electrolyte and anode, is primarily responsible of the superior Li-ion storage property of Cu 3 [email protected] MSPIOs. At the same time, MOF derived carbon can improve electrical conductivity, accelerate the formation of a stable solid electrolyte interface membrane and also provide buffer layers to further alleviate volumetric expansion.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Peiran Tan,Yueming Wang,Xiangru Sun,Ying Zhou,Hongyang Dong,Yan Han,Dejun Li
Li metal is considered an ideal anode for the next-generation rechargeable batteries due to the high specific capacity and ultralow redox potential . However, the growth of Li dendrites severely impedes its application. In this study, a structural Li anode is constructed by decorating the copper phosphide nanowires modified copper mesh (PCM) on Li surface. A self-limiting Li deposition with dendrite-free feature is achieved based on the rational surface chemical and structural engineering of the Li anode. On the one hand, the meshed PCM layer as well as its lithiated species performs excellent lithiophilicity and favorable electron/ion conductivity, effectively reducing the Li nucleation barrier and redistributing the electric field and Li + flux. This promotes a preferential and uniform Li deposition. On the other hand, the suitable combination between PCM and Li not only ensures excellent electrical contact for fast charge transfer, but also establishes a well-balanced structure with abundant active sites and large space for Li nucleation and deposition. Moreover, the meshed surface structure effectively accommodates the volume change of Li during plating/stripping. And the multiplied compressive stress between the PCM and separator greatly suppresses Li growth in vertical direction and promotes a dense Li morphology. Consequently, a self-limiting and highly reversible Li plating/stripping along the horizontal direction is achieved, even at a high areal capacity of 10 mA h cm –2 . The Li deposition preferentially occurs on the PCM skeleton and gradually expands horizontally into the meshed space, without obvious formation of Li dendrites. The symmetrical cells show excellent cycling stability for over 1700 h with a low overpotential (13.1 mV at 1500 h) at 1 mA cm –2 . Furthermore, the cells paired with LiNi 0.6 Co 0.2 Mn 0.2 O 2 cathode also show excellent cycling stability for over 450 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）