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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DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Qinghua Deng,Yong Yang,Siyu Qu,Wenjie Wang,Yinkai Zhang,Xinyan Ma,Wuwei Yan,Yiwei Zhang
Li-CO 2 batteries present considerable prospects both in resourcing CO 2 and remedying the unsatisfied performance of current energy storage devices. Herein, a porous self-supporting cathode for Li-CO 2 battery is fabricated through straightforward anchoring of two-dimensional (2D) cobalt-doped CeO 2 nanosheets on graphene aerogel , bypassing the addition of binder and the complicated manufacturing process. The combination of CeO 2 and Co 3 O 4 results in the reorganization of electronic structure by strongly coupled nanointerfaces, enhancing the reversible formation and decomposition of Li 2 CO 3 . Meanwhile, the unique porous structure facilitates the diffusion of CO 2 and electrolyte in Li-CO 2 batteries. The as-assembled Li-CO 2 battery achieves a superior discharge capacity (7860 mAh/g) and competitive cycling stability (>100 cycles). In particular, a flexible Li-CO 2 battery is developed with the freestanding cathode, which can provide a stable power output during multi-angle bending and folding. The improved conductivity, CO 2 adsorption ability and the electrochemical reaction pathway are revealed by density functional theory (DFT) calculations in detail. This work sheds new light on the development of advanced and flexible Li-CO 2 batteries for wearable electronics.
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DOI
高影响因子
ACS Nano
·
2023
·
IF 17.1
Bin Sun,KangKang Bao,Panpan Wang,Kai Liu,Hui Wu,Yang Jin
Due to their low self-discharge rate, no intermediate product dissolution in the cathode, and easy recycle of electrode materials, solid electrolyte-based molten lithium sulfur batteries can be one of the highly anticipated advanced electrochemical chemistry technologies for grid-scale energy storage. However, the actual energy density and reversibility of them still face severe challenges for low active materials loading and the inherent low conductivity of sulfur and its end-products. In this work, with the iodide modulation effect, small size (∼5 nm for the primary particles) and low relative crystallinity discharge end-products in the sulfur cathode can be formed, contributing to the immense specific capacity and reversibility. As validated by theoretical calculations, iodide ions in the homogeneous molten composite cathode display a profound comprehensive effect on the chemical reaction and cycling stability. As a result, high sulfur loading (over 80 mg cm–2) with a significant utilization rate can be achieved, corresponding to a single Li-S cell of 1.39 Ah and a volumetric energy density of 528.5 Wh L–1 based on the overall cell volume; simultaneously, a prominent cycling stability during 300 cycles along with an impressive reversibility is obtained.
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DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Ling Xin,Yongjian Lai,Xiao-Ning Cheng,Xudong Ma,Qi Liu,Xiao Yu,Yong Liu
Ni-rich layered oxides Li[NixCoyAl1–x–y]O2 (NCA) have become the state-of-the-art cathode materials for high-energy-density Li-ion batteries (LIBs). However, the solubility product of Al(OH)3 is much lower than that of Ni(OH)2 and Co(OH)2, which makes it difficult to produce the NCA precursor with a stoichiometric amount and uniform distribution of Al element in one step by using the coprecipitation method. In addition, high temperatures or complex procedures are required to obtain the single-crystalline Ni-rich cathode materials from the coprecipitation-derived precursor. Here, we develop a modified cation chelation and reassembly process to produce the stoichiometric NCA precursor in a single step. During this process, the addition of acetic acid causes Ni, Co, and Al species to exist in solution as free metal ions instead of hydroxide precipitates, which can be efficiently chelated by ethylenediaminetetraacetic acid and then reassembled into the crystalline precursor. After the lithiation treatment at 500 °C for 6 h and 750 °C for 12 h, the obtained single-crystalline NCA cathode exhibits a high discharge capacity (203.1 mA h g–1 at 0.1C between 3.0 and 4.3 V), good cycling stability (87.2% capacity retention after 100 cycles), and excellent rate capability (126.5 mA h g–1 at 10C). The outstanding electrochemical performance can be attributed to the cooperation of the single crystal together with the stoichiometric amount and uniform distribution of Al element, which can suppress the Li+/Ni2+ mixing level and stabilize the layer structure, enabling fast Li+ diffusivity and electronic conductivity.
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Jingqiu Liu,Qingping Wu,Yaru Wei,Baocheng Zhou,Feixiang Zhou,Xingyue Yu,Song Lan,Feng Wang,Houyang Chen
Polyethylene oxide (PEO)-based electrolytes for all-solid-state lithium metal batteries (ASSLMBs) struggle with rapid dendrite growth at the Li/electrolyte interface under high rates, driven by poor interfacial chemistry and slow Li + transport. Here, we integrate a cationic covalent organic framework with hydrogen-bonding networks (HC-COF) into a PEO matrix to form a composite electrolyte (HC-COF@PEO). Featuring guanidinium units, this cationic COF immobilizes anions through hydrogen-bonding (H-bonding), thus weakening Li + solvation and accelerating Li ion transport kinetics. Its C 3 -symmetric π-conjugated structure ensures stability, ordered stacking, and enhanced mechanical strength. Synthesized via a facile one-step imine condensation at room temperature, HC-COF boosts Li + conductivity up to 6.15 × 10 −4 S cm −1 at room temperature and enables uniform Li + plating/stripping with a low overpotential of 90 mV over 450 h in symmetric cells. LiFePO 4 -based ASSLMBs achieve remarkable cycling stability (1000 cycles at 1C) and superior rate performance. This work demonstrates a straightforward, effective approach to enhance PEO-based electrolytes using cationic COFs, paving the way for practical ASSLMBs.
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产品关联
DOI
PubMed
高影响因子
Advanced Energy Materials
·
2019
·Vol. 10
·期 5
·1903139
·
IF 24.884
Yanchen Liu,Jing Wang,Junwei Wu,Zhiyu Ding,Penghui Yao,Sanli Zhang,Yanan Chen
Li-rich oxide is a promising candidate for the cathodes of next-generation lithium-ion batteries. However, its utilization is restricted by cycling instability and inferior rate capability. To tackle these issues, three-dimensional (3D), hierarchical, cube-maze-like Li-rich cathodes assembled from two-dimensional (2D), thin nanosheets with exposed {010} active planes, are developed by a facile hydrothermal approach. Benefiting from their unique architecture, 3D cube-maze-like cathodes demonstrate a superior reversible capacity (285.3 mAh g −1 at 0.1 C, 133.4 mAh g −1 at 20.0 C) and a great cycle stability (capacity retention of 87.4% after 400 cycles at 2.0 C, 85.2% after 600 cycles and 75.0% after 1200 cycles at 20.0 C). When this material is matched with a graphite anode, the full cell achieves a remarkable discharge capacity (275.2 mAh g −1 at 0.1 C) and stable cycling behavior (capacity retention of 88.7% after 100 cycles at 5.0 C, capacity retention of 84.8% after 100 cycles at 20.0 C). The present work proposes an accessible way to construct 3D hierarchical architecture assembled from 2D nanosheets with exposed high-energy active {010} planes and verifies its validity for advanced Li-rich cathodes.
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DOI
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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DOI
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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DOI
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
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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DOI
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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产品关联
DOI
高影响因子
Separations
·
2026
·Vol. 13
·期 6
·163
·
IF 3.5
Jingyi Wang,Yu Zhang,Lingen Zhang
Spent lithium-ion battery electrolytes contain fluorine-, sulfur-, and phosphorus-bearing toxins, necessitating deep detoxification and directional conversion into C1–C6light hydrocarbons. To elucidate the specific catalytic roles and sequential activation of cathode metals (Li, Ni, Co, Mn), this work systematically deconvolutes their mono- and multi-metallic migration mechanisms over a CaO-ZSM-5* catalyst during vacuum catalytic pyrolysis (530 °C, 100 Pa). Results reveal that Li+and Ni2+dominate C–O bond cleavage in carbonates and CaO-ZSM-5*-assisted decarboxylation and oxygen fixation, significantly increasing the relative hydrocarbon content. Conversely, Co2/3+and Mn4+release reactive oxygen species, causing deep oxidation of hydrocarbons into CO2and antagonizing the targeted conversion. In multi-metallic systems, forming composite metal oxides (MxNyOz) increases the energy barrier for releasing active catalytic ions, hindering carbonate cleavage and leaving unreacted carbonate feedstocks. For detoxification, F and P are effectively immobilized as CaF2and Ca2P2O7. The relative content of detected gas-phase nitriles is minimized to <2% due to the strong antagonistic effect of Ni2+on Li+-promoted hexanedinitrile cleavage, while sulfur species derived from 1,3-propane sultone are converted to SO2and ultimately mineralized as calcium and metal-sulfur salts. Mechanistically, product distributions and crystallographic properties suggest a hypothesized sequential activation model—Li+→ Ni2+→ Mn4+—governing reactivity, whereas Co2/3+does not participate in the synergistic detoxification and selective upgrading process. This migration–reaction coupling framework provides critical insights for cathode-assisted in situ catalytic pyrolysis and closed-loop electrolyte recycling.
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高影响因子
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