ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Zhen Zeng,Shang Wang,Jun Cheng,Guangmei Hou,Deping Li,Guifang Han,Lijie Ci
Solid polymer electrolytes (SPEs) are preferable in the pursuit for developing high-energy Li metal batteries due to their inherent flexibility and intimate contact with electrodes. However, continuous interfacial parasitic reactions and undesired Li dendrite growth caused by inhomogeneous plating/stripping of Li+ result in rapid deterioration of an SPE/Li interface. Herein, a novel Zn2+-containing SPE (SPE-xZn) with anionic groups partially tethered on the polymer chains is developed to meet these challenges. During cycling, Zn2+ cations inside the SPE-xZn will gradually migrate to the surface of a Li electrode and then evolve to a Li-Zn alloy layer, where Li+ can diffuse more efficiently. Meanwhile, owing to the electrostatic interaction, the immobilized anionic groups within SPE-xZn can alleviate local concentrated Li+ flux. The synergistic effects of an in situ formed alloy layer and unique macromolecular structure can promote uniform plating/stripping of Li, thus yielding a more stable SPE-xZn/Li interface. Therefore, steady cycling over 300 h at 0.2 mA cm–2 is achieved by Li/SPE-5Zn/Li, and an impressive capacity retention of 87.3% at 0.5 C after 800 cycles is realized by LFP/SPE-5Zn/Li with an average Coulombic efficiency of 99.90%.
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高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Yanchun Yang,Lijian Huang,Daocheng Pan
In our recent report (ACS Appl. Mater. Interfaces2016, 8, 5308), Li+ ions had been successfully incorporated into the lattice of the selenized Cu2ZnSn(S,Se)4 thin film on a quartz substrate by substituting equivalent Cu+ ions, and Li+ ions was also found to have the little effect on the crystal growth and defect passivation. To further improve the cell performance of Li-doped CZTSSe devices, we conducted the same experiments on the sodium-rich soda-lime glass (SLG) substrate in this study, instead of sodium-free quartz substrate. Surprisingly, only trace amounts of Li (Li/Cu molar ratio ∼1 × 10–4) were detected in the final CZTSSe thin films; meanwhile, a large amount of sodium was present on the surface and at the grain boundaries of the selenized thin films. A Li/Na exchange mechanism is used to explain this phenomenon. Only on the sodium-free substrate can Li+ ions enter the CZTSSe host lattice, and doping Li+ ions on the SLG substrate are nearly identical to doping Na+ ions.
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DOI
PubMed
高影响因子
Nano Energy
·
2020
·
IF 16.602
Huajin He,Fucheng Ren,Jianping Zhu,Yuxuan Xiang,Bizhu Zheng,Sheng Li,Shijian Chen,Yixiao Li,Qi-Hui Wu,Yong Yang
Li-SF 6 battery has been proposed as a novel energy conversion device for both reducing greenhouse-effect SF 6 and potentially providing large specific energy . However, the real discharge process of SF 6 remains ambiguous with fast cathode passivation and large polarization. Here we report that the Li-SF 6 chemistry is able to deliver an unprecedented capacity of >20,000 mA h g c −1 with reduced polarization and excellent rate capability by using a low-cost, high-surface-area porous carbon as cathode host. More importantly, by adjusting the SF 6 atmosphere, an approximately eight-electron transfer process with predominant products of LiF and Li 2 S is realized via two voltage steps, whereas previously only a little Li 2 S could be found with one plateau appearing. The eight-electron process leads to a high energy density about 2,300 W h kg −1 based on the mass of carbon and discharge products, which sheds light on SF 6 as a promising high-energy-density cathode.
研究领域:
能量转换
·
电化学
·
材料科学
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环境科学
·
电源技术
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Shuhan Huang,Qinghua Fan,Xianghong Chen,Yuheng Wu,Liang Liu,Zhenwei Yu,Jiantie Xu
The efficient recycling of waste graphite anode from used lithium-ion batteries (LIBs) has attracted considerable concerns mainly owing to the environment protection and reutilization of resources. Herein, we reported a rational and facile strategy for the synthesis of holey graphite coated by carbon (hG 0.01 @C 0.10 ) through the separation, purification and creation of holey structures of waste graphite by using NaOH and carbon-coating by using phenolic resin. The holey structures facilitate the hG 0.01 @C 0.10 with the quick penetration of electrolytes and rapid diffusion of Li + . The carbon coating is more favorable for hG 0.01 @C 0.10 with improved electronic conductivity and less alleviated volume during the cycles. Benefiting from the synergistic effect of holey structures and carbon coating, the hG 0.01 @C 0.10 as anode for LIBs displays a high reversible capacity of 377.6 mAh g -1 at 0.5 C and superior rate capabilities ( e.g., 348.0 and 274.7 mAh g -1 at 1 and 2 C, respectively) and maintains a high reversible capacity of 278.7 mAh g -1 at 1 C after 300 cycles with an initial capacity retention of 80.0 %.
研究领域:
材料科学
·
能源存储
·
环境科学
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DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2021
·
IF 3.764
Liyuan Li,Tao Li,Yifan Sha,Chi Zhang,Baozeng Ren,Lan Zhang,Suojiang Zhang
Silicon-based anode materials attract ever-increasing attention owing to their high theoretical capacity. However, their practical application is significantly hindered by the dramatic volume change during the charge/discharge process, during which not only the solid electrolyte interface (SEI) but also the electrode might be ruined. Here, we propose a H-bond network-regulated binder by introducing low-molecular-weight cross-linkers, lithium oxalate and α-cyclodextrin (α-CD), into alginate (Alg). The balance between the binding strength and Li ion diffusion is realized through the control of the ratio between them. Lithium oxalate and α-CD can effectively regulate the H-bond network of the binder by forming intermolecular dynamic H bonds with Alg and reducing the intramolecular ones. Although the hybrid binder shows lower adhesion force than Alg, better electrode integrity is obtained during the charge/discharge process. Meanwhile, Li+ transportation is facilitated due to extra Li+ supplied by lithium oxalate, thereby achieving better rate capability.
研究领域:
材料科学
·
电化学
·
能源存储
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高影响因子
HYDROMETALLURGY
·
2026
·
IF 6.3
Yangxiang Huang,Mengyao Chen,Lixin Xue,Hangqing Xue,Juexin Wang,Fei Huang,Congjie Gao
To simultaneously increase the Mg 2+ /Li + separating performance under high Mg 2+ /Li + ratios of polyethylene/polyamide (PE/PA) thin film composite (TFC) nanofiltration (NF) membranes, 1,4,7,10-tetraazacyclododecane (Cyclen) was added in the aqueous phase with polyethyleneimine (PEI) monomer. During reverse interface polymerization (RIP) on polyethylene (PE) substrates, phthaloyl chloride (PC) was added to the organic phase with terephthaloyl chloride (TPC) monomer. It was found that the addition of Cyclen and/or PC could both increase the hydrophilicity, surface roughness and average pore sizes of formed virgin PE/PA TFC NF membranes, leading to increased water permeability. The Li + /Mg 2+ separating factor S Li/Mg first increased and then decreased with maximum points at the TPC/PC ratio of 5:1 and Cyclen addition level of 0.02 wt%. Cation absorption, especially Mg(II)-Cyclen interactions in the PA layers under higher Mg 2+ /Li + ratio led to increased surface Zeta potential, decreased average pore diameters μ p, and greatly increased Li + /Mg 2+ separating factor (S Li/Mg ). S Li/Mg value of PEI-TPC/PC 5:1 -Cyclen 0.02 membranes could be increased from 5.0 to 55.47, keeping the water permeability around 6.5 L m −2 h −1 bar −1 when Mg 2+ /Li + ratio increased from 1 to 100 in the brine.
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Carbon Energy
·
2022
·Vol. 5
·期 2
·e255
·
IF 21.556
Yunke Wang,Yige Zhao,Kangli Liu,Shaobin Wang,Neng Li,Guosheng Shao,Feng Wang,Peng Zhang
Sophisticated efficient electrocatalysts are essential to rectifying the shuttle effect and realizing the high performance of flexible lithium-sulfur batteries (LSBs). Phase transformation of MoSe 2 from the 2H phase to the 1T phase has been proven to be a significant method to improve the catalytic activity. However, precisely controllable phase engineering of MoSe 2 has rarely been reported. Herein, by in situ Li ions intercalation in MoSe 2 , a precisely controllable phase evolution from 2H-MoSe 2 to 1T-MoSe 2 was realized. More importantly, the definite functional relationship between cut-off voltage and phase structure was first identified for phase engineering through in situ observation and modulation methods. The sulfur host (CNFs/1T-MoSe 2 ) presents high charge density, strong polysulfides adsorption, and catalytic kinetics. Moreover, Li-S cells based on it display capacity retention of 875.3 mAh g −1 after 500 cycles at 1 C and an areal capacity of 8.71 mAh cm −2 even at a high sulfur loading of 8.47 mg cm −2 . Furthermore, the flexible pouch cell exhibiting decent performance will endow a promising potential in the wearable energy storage field. This study proposes an effective strategy to precisely control the phase structure of MoSe 2 , which may provide the reference to fabricate the highly efficient electrocatalysts for LSBs and other energy systems.
研究领域:
材料科学
·
电化学
·
储能技术
·
纳米技术
·
电池技术
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DOI
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Hongying Hou,Meng Ye,Jian Lan,Xiaohua Yu,Ju Rong,Yanpeng Jia,Yixuan Wang,Xianxi Liu
The waste materials may result in the environment pollution and the rapid consumption of the non-renewable natural resources if they aren't reasonably recycled in time. LiMn x Fe 1-x PO 4 can combine the advantages of good rate capability of LiFePO 4 and high voltage of LiMnPO 4 , thus attracting more attentions. Herein, LiMn x Fe 1-x PO 4 /C (x = 0, 0.05, 0.1 and 0.2) powders are prepared from three wastes (spent Li foil, expired manganese gluconate and rust) by FePO 4 process. The results show that LiMn x Fe 1-x PO 4 /C (x = 0, 0.05, 0.1 and 0.2) powders appear as the irregular particles with 100–300 nm in size, and Mn 2+ partly substituted at Fe 2+ site. Especially, optimal 10 % Mn 2+ -doping improves the voltage plateau and energy density of LiFePO 4 /C. In detail, LiMn 0.1 Fe 0.9 PO 4 /C cathode delivers the specific discharge capacity of 159.3 mAh/g at 0.2C and 137.7 mAh/g at 1.0C, higher than those of LiFePO 4 /C cathode, LiMn 0.05 Fe 0.95 PO 4 /C cathode and LiMn 0.2 Fe 0.8 PO 4 /C cathode due to high diffusion coefficient (8.36 × 10 −14 cm 2 /s) and wider ionic diffusion channels of LiMn 0.1 Fe 0.9 PO 4 /C. The capacity retention rate of LiMn 0.1 Fe 0.9 PO 4 /C remains 91.0 % even after 500 cycles at 1.0C. Seemingly, optimal 10 % Mn 2+ -doping can indeed improve the reversible capacity and cyclic performance of LiFePO 4 cathode mainly due to lower charge transfer impedance and widen Li ion diffusion channel.
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Nature Water
·
2024
·Vol. 2
·期 7
·663-673
·
IF 0
Zou Hao,Yang Xinge,Zhu Jingling,Wang Fan,Zeng Ziya,Xiang Chengjie,Huang Danfeng,Li Jun,Wang Ruzhu
In the face of escalating global water scarcity, intensified by population growth and agricultural demands, there is an urgent need to improve water efficiency in greenhouse cultivation. The rapid development of atmospheric water harvesting technology offers us an opportunity to address this issue. Here a novel, solar-driven, scalable hygroscopic gel, termed TCP-Li, that demonstrates exceptional water uptake capacity (3.38 g water g sorbent −1 ) and rapid solar thermal water release was reported. As a proof-of-concept application, we utilize this material in a transpiration and evaporation adsorption device (TEAD), which leverages the properties of TCP-Li to efficiently harvest water vapour from plant transpiration and soil evaporation. TEAD operates passively, absorbing moisture at high relative humidity during the night and releasing water for irrigation during the day using natural sunlight. Greenhouse experiments confirmed the efficacy of TEAD in ensuring normal plant growth while providing additional irrigation water (87.1 g per plant and 1,890.6 g m −2 ), thereby achieving an average water-saving effect of 44.9%. This study introduces a groundbreaking solution aimed at enhancing water efficiency in greenhouse cultivation, offering substantial potential for commercial and large-scale agricultural applications and significantly contributing to mitigating the global water crisis and optimizing water use in modern agriculture.
研究领域:
农业工程
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环境科学
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可持续农业
·
材料科学
·
水资源管理
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DOI
Journal of Materials Chemistry C
·
2024
·Vol. 12
·期 11
·3980-3987
·
IF 5.7
Yuechao Tang,Jin Yang,Qinan Mao,Yang Ding,Guojun Zheng,Lang Pei,Jiasong Zhong
Driven by the demand for miniaturized broadband near-infrared (NIR) light sources, considerable effort has been dedicated to developing Cr3+-activated phosphors. However, in many cases, the multivalent nature of the Cr ion is adverse to achieving highly efficient emission of Cr3+. Herein, strategic Li+ co-doping was employed to boost the NIR emission of BaGe4O9:Cr3+. In the phosphor, Li+ ions play a pivotal role in the distribution of Cr3+ on the two octahedral sites and the elimination of Cr4+ and crystal defects, leading to a 42.9-fold enhancement of Cr3+ emission. The obtained BaGe4O9:Cr3+,Li+ exhibited broadband emission centered at 808 nm, with an FWHM of 177 nm and an internal quantum efficiency of 61.3%. A fabricated pc-LED device utilizing the phosphor showcased an NIR radiant flux of 24.8 mW and a photoelectric efficiency of 8.9% at 100 mA. Furthermore, the application of the pc-LED in bio-imaging, night vision and information encryption was successfully demonstrated.
研究领域:
材料科学
·
光电技术
·
光子学
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DOI
高影响因子
ChemSusChem
·
2023
·
IF 8.4
Kangzhe Cao,Sitian Wang,Jiahui Ma,Xiaobing Xing,Xiaogang Liu,Yong Jiang,Yang Fan,Huiqiao Liu
Graphical MnNb 2 O 6 -C nanofibers (NFs) with MnNb 2 O 6 nanoparticles (~15 nm) confined in carbon NFs were prepared and evaluated as Li-ion battery anode. Microstructure reconstruction is verified in this kind of intercalation type anode material and that increases the pseudo-capacitance contributions, which is the main reason for the high-capacity achieved by the MnNb 2 O 6 -C NFs electrode. MnNb 2 O 6 anode has attracted much attention owing to its unique properties for holding Li ions. Unluckily, its application as a Li-ion battery anode is restricted by low capacity because of the inferior electronic conductivity and limited electron transfer. Previous studies suggest that structure and component optimization could improve its reversible capacity. This improvement is always companied by capacity increments, however, the reasons have rarely been identified. Herein, MnNb 2 O 6 -C nanofibers (NFs) with MnNb 2 O 6 nanoparticles (~15 nm) confined in carbon NFs, and the counterpart MnNb 2 O 6 NFs consisting of larger nanoparticles (40–100 nm) are prepared by electrospinning for clarifying this phenomenon. The electrochemical evaluations indicate that the capacity achieved by the MnNb 2 O 6 NF electrode presents an activation process and a degradation in subsequence. Meanwhile, the MnNb 2 O 6 -C NF electrode delivers high reversible capacity and ultra-stable cycling performance. Further analysis based on electrochemical behaviors and microstructure changes reveals that the partial structure rearrangement should be in charge of the capacity increment, mainly including pseudocapacitance increment. This work suggests that diminishing the dimensions of MnNb 2 O 6 nanoparticles and further confining them in a matrix could increase the pseudocapacitance-dominated capacity, providing a novel way to improve the reversible capacity of MnNb 2 O 6 and other intercalation reaction anodes.
研究领域:
材料科学
·
电化学
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DOI
PubMed
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2026
·
IF 4.6
Yi Zhang,Yingying Lu,Yi Zhang,Ningbo Zhang,Hailong Yan,Yinghui Wang,Hongyan Zhou,Yamin Zhang,Deyang Zhang,Gang Yang,Jinbing Cheng
Intercalation-type niobium-based oxides offer considerable promise as lithium-ion battery (LIB) anodes due to their safe operating voltages and structural robustness. However, their intrinsically poor electronic conductivity and sluggish ion transport impede practical deployment. Herein, we report a CoNb 2 O 6 @MXene/carbon nanofibers (CoNb 2 O 6 @MXene/CNFs) composite fabricated via electrospinning and controlled annealing. By embedding CoNb 2 O 6 nanoparticles and highly conductive Ti 3 C 2 T x MXene nanosheets within a flexible carbon nanofiber framework, this hierarchical architecture establishes efficient multi-dimensional electron/ion transport pathways. The excellent electrical conductivity of MXene enhances the charge transfer kinetics, while the carbon nanofiber matrix prevents particle aggregation and buffers volume expansion. Consequently, the optimized electrode achieves a high initial discharge capacity of 762.2 mAh g −1 at 0.1 A g −1 , maintaining 378.6 mAh g −1 after 200 cycles.
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高影响因子
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