Journal of Materials Chemistry A
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2020
·Vol. 8
·期 42
·22065-22074
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IF 11.301
Hongling Guo,Gang Wang,Rutao Meng,Yali Sun,Siyu Wang,Shengli Zhang,Jianyu Wu,Li Wu,Guangxing Liang,Hui Li,Yi Zhang
A Li+-doping strategy is a promising route for achieving highly efficient Cu2ZnSn(S,Se)4 (CZTSSe) photovoltaic devices with a large grain absorber layer, high p-type carrier concentration and good band alignment at the Cu2ZnSn(S,Se)4/CdS interface. However, Li+-doped CZTSSe solar cells based on in situ and pre-deposition doping strategies reported thus far generally suffer from massive lithium losses and sodium rejection due to the soda-lime glass substrate. Therefore, simultaneously fulfilling the goals of simple and efficient Li+-doping remains a major technical challenge, which may be addressed, as we demonstrate here, with the development of a Se&LiF co-selenization process. By engineering the band alignment of the Cu2ZnSn(S,Se)4/CdS interface through the Se&LiF co-selenization process, an encouraging efficiency of 11.63% with an open-circuit voltage deficit of 0.583 V has been reached. Furthermore, the crystallinity of the absorber layer and the distribution of copper are improved, and a more copper-poor CZTSSe surface is formed. This novel Li+-doping strategy introduces a new approach towards the goal of high-performance CZTSSe solar cells compatible with a simple manufacturing process and excellent performance.
研究领域:
材料科学
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光伏技术
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产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Rongrong Guo,Xiaoyun Xu,Songmei Li,Yangyang Cheng,Junwei An,Mei Yu,Jinyan Zhong,Juan Du,Shubin Yang,Bin Li
Lithium bis((trifluoromethyl)sulfonyl)azanide (LiTFSI) based electrolytes have become the preferred electrolytes for lithium metal batteries (LMBs) due to their exceptional anode stability and ionic conductivity. However, challenges including unstable cathode electrolyte interface (CEI) formation and aluminum current collector (AlCC) corrosion have hindered the application of LiTFSI-based electrolyte in high-voltage LMBs. In this work, a universal passivation strategy is proposed and achieved with additive 8-hydroxyquinoline (8-HQ) in LiTFSI based electrolyte (ED-HQ). The 8-HQ additive preferentially decomposes on the cathode surface to generate Li 3 N, inducing the formation of inorganic-rich CEI with a uniform thickness of only 10 nm. The dense and homogeneous inorganic-rich CEI enables the cycling stability of the cathode. Meanwhile, the 8-HQ additive shows strong adsorption on the AlCC surface, which promotes the formation of a composite passivation layer consisting of an Aluminum-8-hydroxyquinoline (Alq 3 ) chelate layer and an AlF 3 /LiF inorganic layer, increasing the stable operating voltage of AlCC to 4.9 V and reducing the corrosion current density to one tenth. As a result, the joint effects enable Li||LiFePO 4 cells with ED-HQ electrolyte to achieve 89.8% capacity retention after 500 cycles at an elevated cutoff voltage of 4.5 V, demonstrating a viable pathway toward stable high-voltage LMB operation.
研究领域:
电化学
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储能
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材料科学
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电池技术
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表面化学
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产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
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2026
·
IF 5.8
Shi Zhou,Bowei Ju,Bangfu Yin,Xiaoyi Chen,Linqing Wang,Jun Li,Jiali Liu,Hongbo Shu,Xianyou Wang
A facile surface modification of LLZO is realized via mild acid-base neutralization with pentafluorobenzoic acid (PFA), which efficiently removes surface Li₂CO₃ without destroying the LLZO crystal structure. • The modified LLZO promotes fast lithium-ion transport at the ceramic/polymer interface and facilitates the formation of a stable LiF-rich solid-electrolyte interphase. • This surface engineering approach significantly improves the interfacial compatibility and long-term cycling stability of PEO-based composite solid electrolytes. Li₇La₃Zr₂O₁₂ (LLZO) and polyethylene oxide (PEO)-based composite solid electrolytes (CSE) demonstrate favorable potential for practical applications. However, the Li₂CO₃ passivation layer tends to form on the surface of LLZO particles, which severely degrades the electrochemical performance of the CSE. Herein, a facile surface modification strategy for LLZO is developed via a mild acid-base neutralization reaction between pentafluorobenzoic acid (PFA) and surface Li₂CO₃ in methanol solvent. With 3 wt% PFA addition, Li₂CO₃ can be efficiently eliminated, accompanied by the in-situ formation of a organic coating layer (3PFA@LLZO). The as-prepared 3PFA@LLZO can be then composited with a PEO matrix to obtain 3PFA@LLZO-PEO composite solid electrolytes. It has been found that the 3PFA@LLZO-PEO exhibits a high ionic conductivity of 1.23 × 10⁻⁴ S/cm at 30 °C. More importantly, the in-situ-formed lithium pentafluorobenzoate promotes the construction of a LiF-rich solid-electrolyte interphase (SEI), which greatly enhances the interfacial stability and compatibility. Consequently, at 30 °C, The LiFePO₄(LFP)/Li half-cell displays a capacity retention of 80% after 400 cycles at 0.5C, while the LiNi 0.7 Co 0.1 Mn 0.2 O 2 (NCM)/Li half-cell presents a high capacity retention of 91.7% after 170 cycles at 0.3C. Therefore, it distinctly demonstrates that the proposed surface modification strategy effectively elevates the comprehensive electrochemical performance of PEO-LLZO composite solid electrolytes. Download: Download high-res image (239KB) Download: Download full-size image
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DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Cheng Liu,Zhanxu Yang,Jie Sun
Phosphorus is a promising anode material for potassium-ion batteries due to the highest theoretical-specific capacity among all the proposed anode materials. So far, it is considered to have similar disadvantages to silicon anode , such as poor electronic conductivity and huge volumetric change, thus, lots of efforts have been devoted to synthesizing phosphorus/carbon hybrids. However, the electrochemical performance is still unsatisfied, due to the unclear capacity decay mechanism. Here we reveal that soluble potassium polyphosphides are generated during potassiation process and shuttle to the counter electrode where the side effects occur, leading to the loss of active phosphorus and the failure of counter electrode. To address this issue, we developed the P/CNT-LiF electrode in combination with the replacement of conventional KPF 6 by potassium bis(fluorosulfonyl)imide (KFSI) in electrolyte, in which KFSI contributes to the formation of stable and tough solid electrolyte interface (SEI), meanwhile LiF can prevent polyphosphides from diffusing to the electrolyte before and after the formation of SEI. Thus, the thin, stable and uniform SEI layer can be generated at the surface of the electrode particles, inhibiting the polyphosphides’ shuttle, contributing to the improved initial coulomb efficiency (73.7%) and reversible specific capacity (507.6 mAh g −1 after 100 cycles at 50 mA g −1 ).
研究领域:
材料科学
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电化学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Yuan Gao,Jing Gao,Zhibin Zhang,Yue Wu,Xiaolin Sun,Fuhua Zhao,Yuan Zhang,Depeng Song,Wenyan Si,Qing Zhao,Xun Yuan,Jianfei Wu
Sulfide solid-state electrolytes have garnered considerable attention owing to their notable ionic conductivity and mechanical properties. However, achieving an electrolyte characterized by both high ionic conductivity and a stable interface between the electrode and electrolyte remains challenging, impeding its widespread application. In this work, we present a novel sulfide solid-state electrolyte, Li3.04P0.96Zn0.04S3.92F0.08, prepared through a solid-phase reaction, and explore its usage in all-solid-state lithium sulfur batteries (ASSLSBs). The findings reveal that the Zn, F co-doped solid-state electrolyte exhibits an ionic conductivity of 1.23 × 10–3 S cm–1 and a low activation energy (Ea) of 9.8 kJ mol–1 at room temperature, illustrating the aliovalent co-doping’s facilitation of Li-ion migration. Furthermore, benefiting from the formation of a LiF-rich interfacial layer between the electrolyte and the Li metal anode, the Li/Li3.04P0.96Zn0.04S3.92F0.08/Li symmetrical cell exhibits critical current densities (CCDs) of up to 1 mA cm–2 and maintains excellent cycling stability. Finally, the assembled ASSLSBs exhibit an initial discharge capacity of 1295.7 mAh g–1 at a rate of 0.05 C and at room temperature. The cell maintains a capacity retention of 70.5% for more than 600 cycles at a high rate of 2 C, representing a substantial improvement compared to the cell with Li3PS4. This work provides a new idea for the design of solid-state electrolytes and ASSLSBs.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
Materials Today Physics
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2024
·
IF 10
Yongjian Chen,Cheng Yan,Zhenyu Chen,Xiankan Zeng,Qungui Wang,Shiyu Yang,Lunyao Pan,Chenglong Li,Maolin Mu,Wen Li,Guanqi Tang,Weiqing Yang
Unbalanced electron-hole injection in perovskite light-emitting diodes (PeLEDs) has always been a major stumbling block limiting device performance. Here we develop a heterointerface Coulomb enhancement strategy to efficiently promote electron injection between perovskite emitter and transport layer and thereby balance the electron-hole recombination equilibrium through manipulating defect-rich positive-charge centers induced Coulomb interactions in LiF interlayer. Through multiscale polarization response characterizations combined with capacitance-voltage and electrochemical impedance spectroscopy, it is confirmed that diffusing holes trapped in LiF layer leads to the increased interfacial polarization. Moreover, the polarization response reversal and high-frequency-dependent dissipation sensitivity further corroborate the LiF-induced interfacial Coulomb enhancement mechanism. The universality of the concept is also successfully verified in devices with electron-only, hole-only, and PN structures. Consequently, the modified PeLEDs show a lower leakage current, along with a significant performance improvement by 1.9 times in external quantum efficiency (18.8%) and 5.7 times in luminance compared with control samples. This study provides a unique perspective to promote carrier transport balance by taking advantage of physical effects within interlayer.
研究领域:
材料科学
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光电
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半导体物理
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
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2026
·
IF 8.2
Yunling Tian,Shuang Li,Zhan Wang,Quanchao Zhuang,Zhicheng Ju,Jiangmin Jiang
Silicon monoxide (SiO), with its high specific capacity and low discharge voltage plateau, stands out as a promising anode material for high-energy lithium-ion batteries. However, the application of SiO anodes suffers from an inferior initial Coulombic efficiency (ICE), the instability of the solid electrolyte interface (SEI) layer, and inferior Li+ transport kinetics, leading to unsatisfactory cycling stability and rate capability. Herein, a LiF/Sn–Li hybrid SEI layer is in situ constructed on chemically prelithiated SiO by spontaneous reaction with SnF2 (SnF2–SiO), driven by the redox potential difference between SnF2 and Li, which induces the reductive decomposition of SnF2 and interfacial chemical transformation. Chemical prelithiation compensates for irreversible lithium loss by introducing additional active lithium, thereby enhancing the ICE of the SiO anodes. Notably, the cooperative effect of LiF and Sn–Li alloy stabilizes the electrochemical interface, enhances Li+ diffusion kinetics, and reduces charge transfer resistance. As expected, the SnF2–SiO delivers a remarkable ICE (99.7%) and cycling stability (1126.0 mAh g–1 after 200 cycles), together with superior overall performance for lithium-ion full batteries (SnF2–SiO//LiFePO4). This work confirms the significance of chemical prelithiation and regulation of the hybrid SEI layer for advancing silicon-based anodes in high-performance lithium batteries.
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产品关联
DOI
PubMed
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Jun Pan,Huili Peng,Yehao Yan,Yuzhou Bai,Jian Yang,Nana Wang,Shixue Dou,Fuqiang Huang
Polymer solid-state batteries (SSBs) possess the advantages of good interfacial contact, but their application faces low ionic conductivity. Here, three-dimensional (3D) porous composite polymer electrolytes with propylene carbonate plasticizer (3D-PPLLP-CPEs) fabricated effectively, displaying high ionic conductivity even at room temperature. Electrochemical in-situ polymerization of 3D-PPLLP-CPEs occurs during the first discharge process, avoiding safety issues caused by the liquid plasticizer without sacrificing the ionic conductivity of the electrolyte. Besides, the controllable in-situ generated LiF-enriched interface can avoid the Li dendrite growth. To further promote the practical value of SSBs, micro-sized Si@Li 3 PO 4 @C with high initial Coulombic efficiency was adopted to replace lithium foil. The LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM111)//Micro Si@Li 3 PO 4 @C full cell has achieved capacity of 129.1 mAh g −1 at a current density of 0.2 C, with capacity retention of 98.5% after 100 cycles, which is the best performance based on the Si anode in SSBs. Even at the high current density of 2.0 A g −1 , the capacity remains 92.5 mAh g −1 . This design of CPEs and electrodes has paved a new way to construct practical SSBs.
研究领域:
材料科学
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电化学
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能源存储
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
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2025
·
IF 19
Yu Han,Jun Li,Shuhuan Hao,Wan-Zhen Fo,Liwen Cao,Mengjiao Li,Yanan Liu,Jianhua Zhang
Photonic synaptic transistors, designed to emulate the multispectral light detection of retinal neurons, play a pivotal role in advancing artificial vision systems capable of full-color image recognition. However, their limited sensitivity to weak and multispectral light significantly hampers their application in full-color image capture and recognition. In this work, a p-i-n structured synaptic transistor is introduced that improves weak light sensitivity and enhances synaptic performance by addressing interface issues. By integrating P3HT/LiF/InZnGdO nanofibers as p-i-n structure, the spectral response is successfully broadened from visible to near-UV region, achieving sensitivity to light intensities as low as 0.05 mW cm −2 . The device exhibits remarkable PPF characteristics across the wavelength range of 395–633 nm, with the PPF index showing a maximum increase of 84% compared to the single InZnGdO nanofiber device. Additionally, multiple neural networks are constructed with data from the synaptic transistor array driven by wavelength-tunable synaptic plasticity to validate the device's feasibility in various application scenarios. The proposed device achieved a recognition accuracy of up to 95.26% for high-precision full-color images based on the public CIFAR-10 dataset. This p-i-n structure offers a novel pathway to enhance the synaptic performance of metal oxide-based synaptic transistors, advancing the development of next-generation artificial vision.
研究领域:
神经形态工程
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光电子学
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人工智能
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材料科学
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传感器与探测器
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2021
·
IF 4.527
He Sun,Yusheng Yang
Neodynium oxyfluoride has been applied for luminescence materials and solid electrolytes because of its structure combined advantages of rare-earth cations with F − and O 2− anions. Since the neodynium oxyfluoride with tetragonal structure retains a defect structure having anion vacancies where anions transfer, it shows higher anion conductivity than that with cubic and rhombohedral structures. The feasibility of synthesizing tetragonal neodynium oxyfluoride in molten fluorides was investigated in this work. The neodynium oxyfluoride was not dissolved in molten LiF–CaF 2 based on the in-situ observation using confocal scanning laser microscope, therefore neodynium oxyfluoride can be easily collected from molten fluorides. The neodynium oxyfluoride with tetragonal structure was successfully synthesized by the reaction of Nd 2 O 3 with molten fluorides. The synthesis process was analyzed by differential scanning calorimetry combining X-ray diffraction and scanning electron microscope. The reaction model was described and the reaction rate constant was calculated. According to the mathematical description of kinetic equation, the reaction rate could be proportional to the interface difference between molten fluorides and solid Nd 2 O 3 .
研究领域:
材料科学
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固体化学
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电化学
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产品关联
DOI
高影响因子
Nano-Micro Letters
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2022
·Vol. 14
·期 1
·1-13
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IF 23.655
Jiang Meifang,Mu Pengzhou,Zhang Huanrui,Dong Tiantian,Tang Ben,Qiu Huayu,Chen Zhou,Cui Guanglei
The double-network binder shows excellent adhesive and self-healing abilities, which help suppress electrode volume expansion and stabilize the electrode interface upon cycling.
This binder induces a Li 3 N/LiF-rich solid electrolyte interface layer, which can suppress continuous electrolyte decomposition.
Superior electrochemical performance can be achieved in Si/Li half cells and LiNi 0.8 Co 0.1 Mn 0.1 O 2 /Si full cells, even with a high loading of Si electrode.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Zhichuan Shen,Jiawei Zhong,Shiyong Jiang,Wenhao Xie,Shiying Zhan,Kaiji Lin,Linyong Zeng,Hailing Hu,Guide Lin,Yuhan Lin,Shuhui Sun,Zhicong Shi
Because of their high ionic conductivity, utilizing gel polymer electrolytes (GPEs) is thought to be an effective way to accomplish high-energy-density batteries. Nevertheless, most GPEs have poor adaptability to Ni-rich cathodes to alleviate the problem of inevitable rapid capacity decay during cycling. Therefore, to match LiNi0.8Co0.1Mn0.1O2 (NCM811), we applied pentaerythritol tetraacrylate (PETEA) monomers to polymerize in situ in a polyacrylonitrile (PAN) membrane to obtain GPEs (PETEA-TCGG-PAN). The impedance variations and key groups during the in situ polymerization of PETEA-TCGG-PAN are investigated in detail. PETEA-TCGG-PAN with a high lithium-ion transference number (0.77) exhibits an electrochemical decomposition voltage of 5.15 V. Noticeably, the NCM811|PETEA-TCGG-PAN|Li battery can cycle at 2C for 120 cycles with a capacity retention rate of 89%. Even at 6C, the discharge specific capacity is able to reach 101.47 mAh g–1. The combination of LiF and Li2CO3 at the CEI interface is the reason for the improved rate performance. Moreover, when commercialized LFP is used as the cathode, the battery can also cycle stably for 150 cycles at 0.5C. PETEA and PAN can together foster the transportation of Li+ with the construction of a fast ion transport channel, making a contribution to stable charge–discharge of the above batteries. This study provides an innovative design philosophy for designing in situ GPEs in high-energy-density lithium metal batteries.
研究领域:
材料科学
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电化学
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电池技术
·
高分子化学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）