International Journal of Minerals Metallurgy and Materials
·
2021
·Vol. 28
·期 2
·305-316
·
IF 2.232
Wang Hao-yang,Cheng Xue,Li Xiao-feng,Pan Ji-min,Hu Jun-hua
To probe the coupling effect of the electron and Li ion conductivities in Ni-rich layered materials (LiNi 0.8 Co 0.15 Al 0.05 O 2 , NCA), lithium lanthanum titanate (LLTO) nanofiber and carbon-coated LLTO fiber (LLTO@C) materials were introduced to polyvinylidene difluoride in a cathode. The enhancement of the conductivity was indicated by the suppressed impedance and polarization. At 1 and 5 C, the cathodes with coupling conductive paths had a more stable cycling performance. The coupling mechanism was analyzed based on the chemical state and structure evolution of NCA after cycling for 200 cycles at 5 C. In the pristine cathode, the propagation of lattice damaged regions, which consist of high-density edge-dislocation walls, destroyed the bulk integrity of NCA. In addition, the formation of a rock-salt phase on the surface of NCA caused a capacity loss. In contrast, in the LLTO@C modified cathode, although the formation of dislocation-driven atomic lattice broken regions and cation mixing occurred, they were limited to a scale of several atoms, which retarded the generation of the rock-salt phase and resulted in a pre-eminent capacity retention. Only NiO phase “pitting” occurred. A mechanism based on the synergistic transport of Li ions and electrons was proposed.
研究领域:
材料科学
·
电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lulu Jiang,Donglin Han
BaZr 0.9 Y 0.1 O 3-δ (BZY10) is a popular composition for the electrolyte in protonic ceramic cells, due to its relatively high proton conductivity, excellent chemical stability, and good compatibility with NiO negatrode substrate during high temperature co-sintering. The microstructure of BZY10 is highly dependent on sample processing, leading to large discrepancy of the electrochemical performance of BZY10 in literature. In this work, three BZY10 samples were prepared by different sample processing and sintering conditions, and the grain interior (bulk) and grain boundary partial conductivities of protons and holes were separated. The sintering processes influenced the transport properties of pristine BZY10 samples significantly, and longer sintering time at high temperature (1650 – 1700 °C) leads to lower proton conductivity in both bulk and grain boundary. However interestingly, longer sintering time resulted in higher ionic transport number of bulk conduction, but lower ionic transport number of grain boundary conduction, possibly due to increasing Ba-deficiency in bulk by longer annealing at high temperature. Besides, adding ZnO into BZY10 decreased the proton conductivity in both bulk and grain boundary, but its ionic transport number of bulk conduction increases. A further analysis based on the theory of space charge layer indicated that adding ZnO leaded to decreased Schottky barrier height in the grain boundary core, and the highest Schottky barrier height was observed in the pristine sample which was sintered for longer time. The results obtained in this work suggest a potential strategy to regulate the transport properties of BZY10 by choosing appropriate approaches for sample processing to control the microstructure and local composition of the polycrystalline BZY10 ceramic electrolyte.
研究领域:
材料科学
·
固体物理
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能源科学
✓ 已验证
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 18
·7076-7083
·
IF 4.569
Bo Gu,Chenyang Zhan,Bing Heng Liu,Gang Wang,Qian Zhang,Ming Zhang,Zhongrong Shen
Perovskite-structured (ABO3) lithium lanthanum titanate (LixLa(2−x)/3TiO3, LLTO) is widely used in all solid state lithium ion batteries due to its high ionic conductivity. In this study, a two-dimensional LLTO nanosheet/graphene (LLTO/C) nanosheet composite has been designed as an electrode material for lithium-ion batteries (LIBs). LLTO/C not only exhibits the ionic conductivity properties of perovskite-type LLTO, but the graphene between the layers of LLTO nanosheets also endows the material with additional electronic conductivity. Moreover, LLTO@C-600 exhibits an excellent rate capability as the electrode for delithiation with a high specific capacity of 350 mA h g−1 at 20 mA g−1, and 70% of the specific capacity can be maintained at 1.0 A g−1 after 800 cycles. The excellent electrochemical performances can be attributed to the superior interficial capacitive Li+ storage capability.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chengfu Zeng,Wen Feng,Yu Shi,Xiaoyu Zhang,Yaxiong Yang,Xiaohua Zheng,Zhihe Liu,Yanxia Liu,Mingxia Gao,Chu Liang,Hongge Pan
Garnet-type Li6.75La3Zr1.75Ta0.25O12 (LLZTO) is a promising solid-state electrolyte (SSE) because of its fast ionic conduction and notable chemical/electrochemical stability toward the lithium (Li) metal. However, poor interface wettability and large interface resistance between LLZTO and Li anode greatly restrict its practical applications. In this work, we develop an in situ chemical conversion strategy to construct a highly conductive Li2S@C layer on the surface of LLZTO, enabling improved interfacial wettability between LLZTO and the Li anode. The Li/Li2S@C-LLZTO-Li2S@C/Li symmetric cell has a low interface impedance of 78.5 Ω cm2, much lower than the 970 Ω cm2 of a Li/LLZTO/Li cell. Moreover, the Li/Li2S@C-LLZTO-Li2S@C/Li cell exhibits a high critical current density of 1.4 mA cm–2 and an ultralong stability of 3000 h at 0.1 mA cm–2. When used in a LiFePO4 battery, the Li/Li2S@C-LLZTO/LiFePO4 battery exhibits a high initial discharge capacity of 150.8 mA h g–1 at 0.2 C without lithium storage capacity attenuation during 200 cycles. This work provides a novel and feasible strategy to address interface issues of SSEs and achieve lithium-dendrite-free solid-state batteries.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ChemNanoMat
·
2024
·Vol. 10
·期 12
·e202400445
·
IF 2.6
Hao Jiang,Peng Yue,Qinchao Gao,Shujia Zhang,Musen Gao,Jinlong Wang,Yang Liu,Linrui Hou,Meng Chen,Changzhou Yuan
Zinc-ion capacitors (ZICs) have great potential for energy storage applications due to high safety, environmental friendliness, low cost, and high energy density. However, challenges such as poor ion diffusion kinetics and the low conductivity of cathode materials still need to be addressed. Nano ZnV 2 O 4 /nitrogen-doped porous carbon (ZVO/N-PC) composites are efficiently synthesized via a simple annealing process. Highly crystalline ZVO nanoparticles are in-situ grown on the three-dimensional N-PC surface by precisely tuning the ratio of the vanadium source, achieving a dual enhancement in electronic and ionic conductivities. Benefiting from the nanoengineering build-up, the optimized ZVO-0.6/N-PC anode exhibits impressive rate performance (405.9/308.8 mAh g −1 at 0.2/5.0 A g −1 ) and cycling capability (0.0029 % capacity drop per cycle at 5.0 A g −1 after 5,800 cycles). Using nitrogen-doped porous activated carbon (N-PAC) as the anode and ZVO-0.6/N-PC as the cathode, the assembled ZICs deliver a high energy density of 27.5 Wh kg −1 at a power density of 450.0 W kg −1 . After 10,000 cycles at 1.0 A g −1 , the capacity retention rate remains as 72.8 %, demonstrating excellent cycling stability. This highlights the promising application of nano ZVO/N-PC composites towards ZICs as competitive cathodes.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
POLYMER COMPOSITES
·
2014
·Vol. 36
·期 11
·2076-2083
·
IF 1.455
Huihui Xu,Jidi Cui,Chunyue Pan,Guipeng Yu,Shiyu Hong,Xipeng Wang,Zhijiang Yao
Polymer blends and composite films were facilely prepared from their aqueous solutions with varying contents of poly(3,4-ethylenedioxythiophene) (PEDOT), polyethylene oxide (PEO), and polyacrylic acid (PAA). The physicochemical and electric properties of the composite films were analyzed by Raman spectra, infrared spectra (FT-IR), scanning electronic microscopy (SEM), thermogravimetric analysis (TGA), and four-point probe method. PEDOT was successfully incorporated into each blend which was confirmed by spectra analysis. The crystallization of PAA or PEO and the structure of PEDOT should be taken into consideration for the electronic conductivity. According to Raman spectra, in the case of PEDOT–PAA–PEO, conformation of the PEDOT backbone changed from the quinoid to the benzoid structure partly. The ionic conductivities of lithium-ion salt-mixed PAA–PEO and ternary blend were characterized by AC impedance spectroscopy. The ternary blend with LiCoO 2 presents good electronic and ionic conductivity, and it appears to be a new candidate for polymeric mixed ionic electronic conductor. POLYM. COMPOS., 36:2076–2083, 2015. © 2014 Society of Plastics Engineer
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yanhua Zhang,Yuhang Mei,Xinglong Gao,Yumei Xiao,Zijun Tang,Xing Xiang,Jiadong Deng
The lithium dendrite problem of Li 7 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) solid electrolyte restricts the practical application and development of all-solid-state lithium batteries (ASSLBs). Herein, a LiPON interlayer with Li + conductive and electron non-conductive dynamic properties is constructed at the Li/LLZTO interface. Results show that the electronic conductivity of solid electrolyte after LiPON modification decreased by nearly three orders of magnitude, indicating that it has good ability to hinder electron conduction . The interlayer enhances the wettability between the Li metal anode and LLZTO, resulting in a decrease of battery resistance from 3400 Ω to 700 Ω. The critical current density of the ASSLBs increase from 0.1 mA cm −2 to 1.2 mA cm −2 at room temperature, and the battery cycle number increase from 31 h to over 1000 h. XPS deep etching results show that the LiPON/LLZTO interface has good electrochemical stability. The Kelvin probe force microscope displays a sharp increase in potential within the LiPON interlayer, indicating its successful hindrance of electron conduction to the solid electrolyte. The effective inhibition of lithium dendrites growth is due to LiPON can promote the Li + transmission from LLZTO solid electrolyte to Li anode, and also hinder the electron conduction to LLZTO to form lithium dendrites.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
界面工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 39
·2204823
·
IF 19.924
Wei Cui,Yong Zheng,Ruijie Zhu,Qifeng Mu,Xiaoyu Wang,Zhisen Wang,Shengqu Liu,Min Li,Rong Ran
Ion is one of the most common additives that can impart electrical conductivity to insulating hydrogels. The concurrent toughening effect of ions, however, is often neglected. This work reports the extreme toughening of hydrogels via the synergistic effect of cations and anions, without the need for specific structure design or adding other reinforcements. The strategy is to equilibrate a physical double network hydrogel consisting of both multivalent cation- and kosmotropic anion-sensitive polymers in specific salt solutions that can induce cross-linking and salting-out simultaneously. Both effects are proven positive to boost the mechanical performance and electrical conductivity of the original weak gel, and result in a tough conductive gel with exceptional physical properties, achieving significant enhancements in fracture stress, fracture energy, and ionic conductivity by up to 530-, 1100-, and 4.9-folds, respectively. The optimal fracture stress and toughness reach approximately 15 MPa and 39 kJ m –2 , exceeding most state-of-the-art tough conductive hydrogels. Meanwhile, a satisfactory ionic conductivity of 1.5 S m –1 is attained. The presented simple strategy is also found generalizable to other salt ions and polymers, which is expected to expand the applicability of hydrogels to conditions involving demanding mechanical durability.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
高影响因子
FOOD CHEMISTRY
·
2025
·
IF 9.8
Xiang-Shu Hu,Xin Jing,Jing-Wen Mei,Fu-Xiang Liu,Pei-Yong Feng,Jiayi Xu,Yue-Jun Liu
Hydrogels have emerged as ideal materials for sensor fabrication due to their tunable mechanical properties, flexibility, and biocompatibility. However, their high-water content makes them prone to freezing at low temperatures, which compromises their conductivity and mechanical integrity, limiting their use in cold environments. To address this issue, we present a novel hydrogel system consisting of a polyacrylamide (PAM) backbone, a binary solvent system of water and ethylene glycol (EG), and functional materials including polyvinyl alcohol (PVA) and modified MXene. The addition of modified MXene as a conductive filler significantly enhances the hydrogel's conductivity, enabling it to maintain its performance even at low temperatures. Furthermore, the introduction of EG effectively lowers the freezing point of the hydrogel to −36.9 °C, ensuring robust frost resistance. The resulting hydrogel not only shows exceptional low-temperature stability but also exhibits high sensitivity. Moreover, the hydrogel demonstrates rapid responsiveness and high accuracy when being integrated as sensors to detect human motion and ammonia concentrations. These results highlight the potential of MXene-enhanced hydrogels for applications in freshness detection of raw meat and human motion tracking, particularly in cold environments.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Energy Research
·
2021
·
IF 4.008
Chao Zheng,Kai Wang,Lujie Li,Hui Huang,Chu Liang,Yongping Gan,Xinping He,Wenkui Zhang,Jun Zhang
Among many lithium secondary batteries, lithium–sulfur batteries stand out because of their high theoretical specific energy, low cost, non-toxicity and the fact that they cause no environmental pollution. However, due to poor electronic and ionic conductivity, shuttle effect, lithium dendrites and other defects, it remains a big challenge to achieve large-scale application of lithium-sulfur batteries. Here we report an all-solid-state lithium–sulfur battery based on Li-argyrodite Li6PS5Cl solid-state electrolytes through a slurry-coating method. Li6PS5Cl with a high ionic conductivity of 1.3 × 10–3 S cm−1 at room temperature is used as the solid electrolyte and the ion conductive additive in the electrode. The sulfur-based composite cathode is fabricated through a slurry-coating process by dispersing sulfur, Li6PS5Cl, ethyl cellulose, and carbon black in 1,3-dioxolane (DOL). This method can disperse the Li6PS5Cl around sulfur particles well, and the solvent does not react with any component of composite cathodes during preparation. The battery delivers a high discharge capacity of 962 mA h g−1 at room temperature for the first cycle at 80 mA g−1. While the Coulombic efficiency is approximately 99.5% during 100 cycles. This work provides a new insight into the combination method between the sulfide-type SSEs and sulfur cathodes, which is critical to the electrochemical performance of all-solid-state lithium-sulfur batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态电池
·
纳米材料
·
界面化学
·
电极工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Qian Zhou,Hao Feng,Lei Fang,Wei Bao,Kuanjun Fang
The development of wearable electronics, energy storage, and smart sensing has significantly increased the demand for highly conductive circuits on textiles. Silver (Ag) is a preferred material due to its excellent electrical conductivity, antibacterial properties, and biocompatibility. However, the hydrophobic nature and low surface energy of polyethylene terephthalate (PET) fabrics pose challenges for the adhesion of silver particles, limiting the mechanical durability and washability of conductive layers. This study proposes a novel strategy combining the synergetic pretreatment of PET fabrics using reducing agents (ascorbic acid and glucose) and hydroxypropyl methylcellulose (HPMC) to enhance the deposition of silver layers. The reducing agents facilitate the conversion of silver ions to metallic silver, while HPMC forms a uniform film on the fabric surface, providing anchoring points for silver particles through hydrogen bonding. The resulting silver layers exhibit high conductivity, uniformity, and durability, as confirmed by SEM, XRD, and XPS analyses. The treated fabrics demonstrate low electrical resistance and excellent abrasion resistance after multiple washes and rubbing. This method offers a simple, scalable, and cost-effective approach for constructing conductive textiles, with potential applications in wearable electronics and smart sensing.
研究领域:
材料科学
·
纺织工程
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS A-PHYSICAL
·
2024
·
IF 4.1
Xingang Luan,Qinghua Zhao,Xuefei Sun,Shaomin Gu,Xichao Dong,Laifei Cheng,Ralf Riedel
Aiming at the lack of stable and reliable electrode materials for high temperature wireless sensors , a solution was proposed to use SiBCN ceramic as thin film electrode. To optimize the conductivity of SiBCN coatings, different conductive fillers were incorporated into the precursor solution to prepare conductive SiBCN coatings and the relationship between the coating process parameters, surface morphology and conductivity was established. The results show that the microstructure of the composite can be adjusted in terms of the HfB 2 /CNT ratio to optimize the electrical conductivity . HfB 2 and CNTs are evenly distributed in the coating by adding dispersants and ground SiBCN self-fillers. The electrical conductivity of SiBCN coatings can be greatly enhanced by adding HfB 2 and CNTs fillers. Integrating conductive fillers such as HfB 2 and CNTs can form a diafiltration path and the resistivity of the prepared coating has been determined to be as low as 0.13 ± 0.01 Ω m. The conductivity did not necessarily increase with an increasing amount of fillers. Adding a balanced amount of filler particles to the ceramic matrix is the requirement for optimizing the electrical conductivity of the coating.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）