Energy & Environmental Materials
·
2021
·Vol. 6
·期 2
·e12336
·
IF 15.122
Yaqing Wei,Jun He,Jie Zhang,Mingyang Ou,Yanpeng Guo,Jiajun Chen,Cheng Zeng,Jia Xu,Jiantao Han,Tianyou Zhai,Huiqiao Li
Among the alloying-type anodes, elemental Sb possesses the suitable yet safe plateau, simple lithiation pathway, small voltage polarization, high conductivity, and superior cycle stability. However, challenge is that its intrinsic capacity is rather low (660 mAh g −1 ), <1/6 of silicon. Herein, we propose a seamless integration strategy by merging the voltage and capacity of phosphorus and antimony into a solid solution alloy. Interestingly, the enlistment of P is found greatly enlarge the capacity from 660 to 993 mAh g −1 for such Sb 30 P 30 solid solution, while maintaining a single and stable discharge plateau (~0.79 V) similar to elemental Sb. Various experimental characterizations including XPS, PDF, Raman, and EDS mapping reveal that in such a material the P and Sb atoms have interacted with each other to form a homogenous solid solution alloy, rather than a simple mixing of the two substances. Thus, the Sb 30 P 30 exhibits superior rate performances (807 mAh g −1 at 5000 mA g −1 ) and cyclability (821 mAh g −1 remained after 300 cycles). Furthermore, such Sb 60-x P x alloys can even deliver 621 mAh g −1 at −30°C, which can be served as the alternative anode materials for high-energy and low-temperature batteries. This unique seamless integration strategy based on solid solution chemistry can be easily leveraged to manipulate the capacity of other electrode materials at similar voltage.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Kaiquan He,Hong Tan,Shizhen Li,Pu Hu,Chaoqun Shang
The Li-S batteries possessing high theoretical energy density are promising for next-generation energy storage. However, the shuttle effect and slow conversion of lithium polysulfides seriously hinder the practical application. In this contribution, introducing metallic Cu to modify dual-phase TiO 2 (rutile/anatase) grown on N-doped carbon nanosheets (denoted as Cu/mTiO 2 -NC) can act as a buffer layer to confine the active S species in the cathode region effectively. The corresponding systematic experiments show that the Cu/mTiO 2 -NC provides sufficient surface affinity to adsorb and capture polysulfides and has a highly conductive C/N skeleton to achieve rapid electron migration. Moreover, the metallic Cu can react with polysulfides to further immobilize polysulfides. Thus, the Li-S batteries, with the aid of optimal Cu/mTiO 2 -NC, exhibit a desirable discharge capacity of 811 mA h g –1 after 100 cycles at 0.2 C, which is 50 % higher than that without Cu/mTiO 2 -NC. Moreover, the optimum Li-S batteries deliver a discharge capacity of 435.45 mA h g –1 after 600 cycles at 0.5 C, corresponding to attenuation per cycle of only 0.09 %.
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Journal of Energy Storage
·
2024
·
IF 8.9
Chen Jia,Yong-Feng Shen,Miao Wang,Wen-cui Li
The cathodic pre-lithiation process, currently considered the most feasible resolution to address the irreversible depletion of Li + in dual carbon-based lithium-ion capacitors (LICs), encounters obstacles in widespread adoption due to its substantial dosage requirement, rising decomposition potential and the damage related to its decomposition residues. Hence, in this study, the successful utilization of Li 2 NiO 2 for LIC pre-lithiation is accomplished, leveraging the synergistic effect between Li 2 NiO 2 and lithium difluoro oxalate borate (LiDFOB). It's noteworthy that the full capacitor, entirely composed of commercial materials (activated carbon/hard carbon) and supplemented with 20 wt% LNO +2 wt% LiDFOB, exhibits remarkable energy densities of 98.53 Wh kg −1 at a power density of 31 W kg −1 and 19 Wh kg −1 at a power density of 4.65 kW kg −1 . Moreover, the full capacitor displays commendable performance, demonstrating superior capacitive behavior and excellent high-current cycling proficiency. Besides, electrochemical evaluations and structural analyses unveil that LiDFOB, via solid electrolyte interface (SEI) modification, enhances the utilization of Li + sourced from Li 2 NiO 2 thus avoiding the abuse of pre-lithiation reagents, while the LNO decomposition products contribute substantially to additional capacitance. The synergistic effect of pre-lithiation reagent and SEI modification underpin the outstanding performance witnessed in the full capacitor.
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高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Kailing Sun,Mingrui Liu,Siyan Yu,Huiyu Song,Jianhuang Zeng,Xiuhua Li,Shijun Liao
The Li–O 2 battery is one of the most promising next-generation energy storage systems due to its super-high theoretical energy density . However, its further development is impeded by the current cathode system, which exhibits low energy efficiency and poor cycling stability. Herein, we report a composite of vanadium nitride coated with nitrogen-doped carbon nanoribbons grown in situ on carbon paper (denoted as VN@C) as a novel binder-free cathode for Li–O 2 batteries. We find that the nitrogen-doped carbon coating can significantly improve the stability of VN and enhance the composite's ORR/OER activities. The Li–O 2 batteries with our optimal VN@C-850 cathodes achieve an initial discharge capacity of 8269 mA h g −1 , a discharge-charge voltage gap of 0.88 V, and considerable cycling stability for 183 cycles with a cut-off capacity of 1000 mA h g −1 , compared with 2027 mA h g −1 , 1.21 V, and 12 cycles with uncoated VN cathodes.
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高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 46
·26513-26523
·
IF 10.733
Peng Huang,Min Huang,Hai Hu,Yuan Zhong,Chao Lai,Shulei Chou
The push for high performing electronic devices with long battery lives has rapidly advanced the field of energy storage systems. Niobium oxides have stood out as promising candidates to improve the storage and rate performance of anodes in lithium- and especially sodium-ion batteries due to their larger interplanar lattice spacing and patulous framework. Herein, we report the first synthesis of a nanosized metal/metal oxide hybrid composite coated by N-doped carbon and anchored onto reduced graphene oxide (NbO/Cu@NC-RGO) through in situ carbonizing of Cu-doped polyoxoniobate precursors. The strong synergistic effects between the uniformly distributed NbO/Cu hybrid nanoparticles, the N-doped carbon coating layer, and graphene substrates not only ensure efficient electron and ion transport, but also boost pseudocapacitive charge storage. The resulting composite exhibits a maximum reversible charge capacity of 580 mA h g−1 after 100 cycles at a current density of 100 mA g−1 when utilized in lithium-ion batteries (LIBs), and 203 mA h g−1 when utilized in sodium-ion batteries (SIBs). For SIBs in particular, a long-lifetime of 1012 cycles is observed when cycled at a high current density of 800 mA g−1. This work represents a promising step forward in the design and preparation of metal oxide composite anodes for LIBs and SIBs.
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高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Yun Yi,Kaixu Yang,Rongfeng Hu,Fei Liu,Chaochuang Yin,Jianxin Cao,Zheng Chen
Enhancing the surface and structural stability has been a research focus of nickel-rich layered cathode materials in lithium-ion batteries (LIBs). This work introduced a dual-functional modification strategy. LZMP is coated on the LiNi0.90Co0.05Mn0.05O2 (NCM90) particle surface to protect the cathode particles from erosion by air and acidic electrolyte, suppressing side reactions between the cathode and H2O, CO2, and HF, and hence enhances the stability of the cathode–electrolyte interphase film. Meanwhile, NCM90 is doped with Zr4+ and Mg2+, which substitute for Ni3+ in the lattice transition metal layer and Li+ in the lithium layer, respectively. Zr4+ forms a stronger Zr–O bond, while Mg2+ performs as a pillar ion, suppressing variations of the lattice parameters and maintaining the layered structure during cycling. The enhanced surface and bulk structural stabilities improve the cycling and rate performances of the cathode material. At 25 °C, 1C, and 2.7–4.3 V, the initial discharge specific capacity and the capacity retention after 200 cycles of 1%LZMP–NCM90 were 180.9 mAh g–1 and 86.0%, respectively, exceeding those of NCM90 (172.7 mAh g–1 and 76.4%). In summary, the LZMP modification synergistically alleviates the surface and bulk structure deterioration, thus preserving the electrochemical performance and improving the structural and cycling stability of NCM90.
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产品关联
DOI
高影响因子
RARE METALS
·
2025
·
IF 11
Zheng Hao-Yuan,Jin Chen,Che Hang,Lee Chia-Tse,Liu Guang,Wang Li,Zhao Yu-Yuan,Liu Hai-Zhen,Wang Xin-Hua,Yu Yi-Feng,Yan Mi
The Li–Mg–N–H (Mg(NH 2 ) 2 –2LiH) system, as a high-capacity Mg-based metal hydrogen storage material (5.6 wt%), has broad prospects for in vehicle hydrogen storage applications, but it still has high hydrogen ab/desorption barriers. To improve its hydrogen storage performance, a nanohydrogen storage alloy was innovatively combined with Mg(NH 2 ) 2 –2LiH, AB5 type nanohydrogen storage alloy LaNi 5 was prepared by co-precipitation method. Nano LaNi 5 and single-walled carbon nanotubes (SWCNTs) were co-doped into the Mg(NH 2 ) 2 –2LiH system at a ratio of 10 wt% and 2 wt%, significantly enhancing the hydrogen storage performance of Mg(NH 2 ) 2 –2LiH. The initial hydrogen ab/desorption temperatures of the co-doped system decreased from 110/130 °C to 45/85 °C. The release of by-product ammonia is significantly inhibited. 4.73 wt% H 2 can be ab/desorption in 150 min at 180/170 °C. Cycle tests show that the co-doped system can still maintain a hydrogen storage capacity of 4.75 wt% after ten hydrogen release cycles. Mechanism and density functional theory study have shown that during the hydrogen release process, partially hydrogenated LaNi 5 weakens the chemical bonding in Mg(NH 2 ) 2 , promoted the dissociation of hydrogen from the Mg(NH 2 ) 2 –2LiH system, while playing a dual role of "hydrogen overflow" and "hydrogen pump". SWCNTs act as auxiliary agents, helping to refine particle size and increase thermal conductivity. The synergistic effect of the two optimizes the comprehensive hydrogen storage performance of Mg(NH 2 ) 2 –2LiH. This study provides a new research method for improving the comprehensive hydrogen storage performance of Mg-based metal hydrogen storage materials using rare earth element catalysts. Graphical abstract
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高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Halizati Abulimiti,Aierken Sidike,He Jiuyang
Highly efficient blue-cyan phosphors can fill the cyan gap in conventional white light-emitting diode (LED) devices to improve the spectral continuity while effectively increasing the white LED colour rendering index (Ra). In this study, Ba 0·94 Al 2- x Ga x Si 2 O 8 :0.06Ce 3+ , M + (Li, Na, K, x = 0–0.8) blue-cyan phosphors with a feldspar structure were prepared by a high-temperature solid-phase method using charge compensation and cation substitution strategies. The barium (Ba) vacancy due to the charge-imbalance substitution of Ce 3+ is compensated by the different charge compensators Li + , Na + , and K + . The charge compensators affect the luminescence performance of the samples, with the K + -compensated samples showing the greatest enhancement, with intensities up to 1.8 times that of the uncompensated samples. The cation substitution strategy using Ga 3+ to partially replace Al 3+ further improves the luminescence performance of the Ba 0·94 Al 2 Si 2 O 8 :0.06Ce 3+ , 0.04 K + sample, and the excitation band is also improved. In this case, the luminescence intensity of the Ba 0·94 Al 2 Si 2 O 8 :0.06Ce 3+ luminescent material is increased by a factor of 6, and a broadband blue-cyan phosphor with a full-width at half-maximum of 118 nm containing blue, cyan and green is obtained. The co-doping of charge compensators and partial cation substitution improved the luminescence performance of phosphors. The representative sample Ba 0·94 Al 1.6 Ga 0.4 Si 2 O 8 :0.06Ce 3+ , 0.04 K + has a luminescence intensity at a temperature of 150 °C that is 83.2% of that at room temperature and good thermal stability . The combination of 365 nm near-ultraviolet (NUV) LED chips with Ba 0·94 Al 1.6 Ga 0.4 Si 2 O 8 :0.06Ce 3+ , 0.04 K + and the commercial red powder (Ca, Sr)AlSiN 3 :Eu 2+ yields a white LED device with an Ra of up to 93 and a correlated colour temperature (CCT) of 4825 K. These results show that the blue-cyan phosphor complements the cyan component while simplifying the manufacturing process of white LEDs.
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高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Minsui Li,Youhao Liao,Qiuyu Liu,Jiaxin Xu,Fangbin Chen,Jinhong Huang,Weishan Li
To compensate the disadvantage of traditional poly(vinylidene fluoride- co -hexafluoropropylene) (P(VdF-HFP)) based gel polymer electrolyte (GPE) with poor rate performance, new GPE system consisted of P(VdF-HFP) and poly(methyl vinyl ether- alt -maleic anhydride) (P(MVE-MA)) with different ratios were prepared by electrospinning technology using polyethylene (PE) as support. After introducing P(MVE-MA) into P(VdF-HFP) system, the performance of the blended membrane and the GPE was significantly improved. Especially M4 based GPE blended with the mass ratios of P(MVE-MA): P(VdF-HFP) = 75: 25 exhibited the best physical and electrochemical characterizations. The developed membranes with interconnected fibrous structure showed the average diameter of 0.1–2.0 μm, which were facilitated for uptaking the liquid electrolyte and improving the ionic conductivity for corresponding GPEs. The introduced P(MVE-MA) copolymer presented higher decomposition voltage than P(VdF-HFP) copolymer from the calculation result of oxidation potential, leading to higher oxidative stability for blended GPE than pure P(VdF-HFP) based GPE. Furthermore, M4 based GPE presented remarkable interfacial compatibility with electrode and the lower polarization resistance , resulting in better cycling stability and rate performance, which had 96.5% capacity retention after 100 cycles and the discharge capacity at 5 C kept 91.6% of 1 C capacity in Li/GPE/LiNi 0.5 Mn 1.5 O 4 coin cell, compared with P(VdF-HFP) based GPE that had 87.8% retained capacity after 100 cycles and 48.7% retention capacity at 5 C .
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高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.5
Ziyao Wang,Sijia Huo,Meichen Pan,Yihan Qiu,Ying Tian,Ying Zhou,Wei Yan,Wen Wang,Yu Zhou,Xiaoming Duan
Lithium metal is considered an ideal anode material owing to its high specific capacity, low density, and low redox potential, but its practical use in liquid systems is hindered by dendrite growth and interfacial instability. Solid-state electrolytes (SSEs) offer high thermal stability and mechanical strength, with Li 7 La 3 Zr 2 O 12 (LLZO) particularly attractive for its high ionic conductivity and wide electrochemical window. Semi-solid-state electrolytes (SSSEs), integrating the advantages of SSEs and liquid electrolytes (LEs), can be further enhanced by introducing porous solid frameworks. Such structures improve wettability and transport while providing mechanical support that suppresses dendrites, thereby achieving both high conductivity and structural safety. In this work, a two-dimensional porous solid-state skeleton model was established to investigate the influence of porosity on lithium-ion transport. The percolation threshold was determined to be 47.91% porosity, indicating the minimum connectivity required for efficient ion migration. Based on these insights, a graphite-template sacrificial method was employed to fabricate a highly interconnected porous Li 6.25 Ga 0.25 La 3 Zr 2 O 12 (LGLZO) framework (P G LF). The ionic conductivity of the P G LF-LiPF 6 SSSE reached 3.02×10 -3 S cm -1 at room temperature. The constructed Li/Li cell can be stably cycled for more than 1600 h at 0.5 mA cm -2 , and the capacity retention rate of the LFP/Li cell was 91.62% after 2000 cycles at 2 C. In addition, similar properties can be achieved by replacing the formwork material (charcoal powder). This work established a correlation between porosity and ion transport performance, providing a promising preparation method for high-performance lithium metal batteries (LMBs).
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高影响因子
Journal of Environmental Chemical Engineering
·
2026
·Vol. 14
·期 5
·124017
·
IF 7.5
Tianyu Feng,Qian Xu,Beichen Sun,Yulong Zhang,Can Wang,Xiao Du,Yongguo Li,Fengfeng Gao,Xiaogang Hao
The high Mg/Li ratio is a core bottleneck leading to the low efficiency of lithium extraction from salt lake brine using Electrochemically Switched Ion Exchange (ESIX) technology. As a key component in the ESIX system, the binder significantly influences ion separation performance. This study employs KH-PE, which contains ether groups, as a binder to fabricate a LiMn 2 O 4 /C/KH-PE composite film electrode. Experiments show that compared with the LiMn 2 O 4 /C/PVDF film electrode prepared with the traditional PVDF binder, this composite film electrode exhibits excellent magnesium ion transport inhibition in high Mg/Li ratio solutions. Based on these findings, this paper further explores its underlying mechanism, attributing it to the strong interaction between the ether groups and magnesium ions. This interaction induces the formation of Mg 2 + -rich interfacial region on the film surface during the adsorption process, thereby effectively repelling magnesium ions from the solution through the Donnan effect. ESIX experiments conducted in brine demonstrate that the LiMn 2 O 4 /C/KH-PE film electrode achieves a high Mg/Li separation factor of 2538, showing excellent lithium selectivity. In summary, the application of the ether-containing KH-PE binder provides an effective approach to overcome the challenge of competitive adsorption between magnesium and lithium under high Mg/Li ratio conditions.
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高影响因子
JOURNAL OF CHEMICAL AND ENGINEERING DATA
·
2026
·
IF 2.4
Ya-Li Wang,Rui-Zhi Cui,Hong-Bao Ren,Qiu-Ye Yang,Wu Li
This study addresses the unclear crystallization behavior of rubidium in chlorobromine coexisting brine systems through experimental and simulation approaches. First, the phase equilibrium data of the ternary system RbCl–RbBr–H2O at 298.15 K were determined using the isothermal dissolution equilibrium method, and the corresponding phase diagram was constructed. The solid phase was characterized by XRD and SEM-EDS, and solubility was theoretically calculated and validated using the Pitzer model. To further elucidate the solid-solution formation behavior of rubidium in chlorobromine coexisting brine systems at the microscopic level, molecular dynamics simulations were performed. Combined with the previously reported phase diagrams of MCl–MBr–H2O systems (M = Li+, Na+, K+, NH4+), the radial distribution functions, coordination numbers, and mean square displacements of different systems were systematically analyzed to examine the differences in ionic hydration structures and migration behavior. From macroscopic phase equilibria to microscopic ion dynamics, this study systematically clarifies the common patterns of formation of continuous solid solutions in chlorobromine coexisting brine systems.
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高影响因子
危险品化学品经营许可证（带存储）