IONICS
·
2021
·Vol. 27
·期 7
·2867-2876
·
IF 2.817
Yu Juan,Peng Jiaxin,Huang Wenlong,Wang Lejie,Wei Yinbo,Yang Naixing,Li Linbo
A Li 2 MoO 4 -coated LiNi 0.8 Co 0.1 Mn 0.1 O 2 cathode material was successfully synthesized by introducing Mo source during the lithium mixing process. The influence of Li 2 MoO 4 -coating on the structure, morphology, and electrochemical performance related to LiNi 0.8 Co 0.1 Mn 0.1 O 2 has been studied. The results of the cyclic voltammetry (CV) and differential voltage curve measurement show that the electrode polarization and irreversible capacity of the modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 are smaller than the virgin material. Meanwhile, the capacity retention of LiNi 0.8 Co 0.1 Mn 0.1 O 2 increases from 64.6 to 90.59% after the 100th cycle at 1 C (1 C=200 mA g −1 ). Additionally, compared with the recycled materials, a thinner solid electrolyte interface (SEI) film was formed on the modified LiNi 0.8 Co 0.1 Mn 0.1 O 2 material. The improvement of the electrochemical performance for LiNi 0.8 Co 0.1 Mn 0.1 O 2 is mainly due to the existence of the Li 2 MoO 4 protective shell that improves the structural stability of the core material, avoids direct contact between the electrolyte and the active material, and suppresses the occurrence of side reaction.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 4
·1617-1627
·
IF 2.394
Ren Xiaoying,Du Junlin,Pu Zhaohui,Wang Runbo,Gan Liao,Wu Zhu
High-temperature lithium battery system operated between 150 and 300 °C is highly desirable to be applied in oil/gas and geothermal explorations. However, the development of cathode material for high-temperature lithium batteries is relatively sluggish. In this study, LiNi 1/3 Co 1/3 Mn 1/3 O 2 (NCM) is coated with Li 2 MoO 4 by a facile solid-state reaction between MoO 3 and surface lithium residue and the resulting composite is applied in high-temperature lithium batteries as a novel cathode material. Such a strategy can not only remove lithium residue components, but also facilitate lithium-ion transport in NCM through the resulting Li 2 MoO 4 coating layer. At 200 °C, the discharge capacity and rate capacity of Li 2 MoO 4 coated NCM are dramatically improved compared to the pristine one. At 300 °C, the electrochemical performance of 4m-NCM is better than other samples, and each sample exhibits better electrochemical performances than it is at 200 °C due to the enhanced kinetics in high temperature.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2019
·Vol. 25
·期 11
·5353-5360
·
IF 2.289
Ren Xiaoying,Xu Tao,Du Junlin,Pu Zhaohui,Wang Runbo,Wu Zhu
High-temperature battery system operated at or below 300 °C is highly desired for geothermal borehole applications. However, it remains a challenge to find suitable electrode materials meeting the need of wide borehole temperature. In this study, the discharge performance of Li 2 MoO 4 /LiNO 3 -KNO 3 /Li-Mg-B alloy battery system was studied over the temperature range of 150~300 °C with different current densities ranging from 10 to 30 mA cm −2 . The electrochemical test result showed that the single cell delivered maximum discharge capacity at 250 °C, with value of 1178.6 mAh g −1 at a current density of 10 mA cm −2 . Besides, it is found that the discharge capacities of the single cell increased as the current density rose at 300 °C attributed to the enhanced ionic conductivity at high temperature. As a result, the Li 2 MoO 4 /LiNO 3 -KNO 3 /Li-Mg-B alloy system is capable of being used in instrumentation for geothermal and oil/gas borehole explore between 200 and 250 °C.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2020
·
IF 4.495
Naichao Chen,Bin Xiao,Xinwei Xu,Tao Sun,Meiyu Chen,Renchao Hu,Xinglei Deng,Xianqiang Chen,Hong Wang
In this paper, (1- x )Li 2 MoO 4 (LMO)- x Ni 0.2 Cu 0.2 Zn 0.6 Fe 2 O 4 (NCZO) ceramic composites were consolidated using cold sintering method at a temperature of 150 °C, which is far below the sintering temperature of NZFO ceramic-based systems via conventional ceramic preparation method. The phase composition, microstructure, dielectric properties and magnetic properties of the as-cold-sintered LMO-NCZO ceramic composites were studied. The relative density of all composites is larger than 95 % at a cold sintering temperature of 150 °C for 30 min under a uniaxial pressure of 200 MPa. XRD results showed that the composites were only composed of two phases. SEM revealed that the NCZO particles were enwrapped by the LMO phase. The 0.46LMO-0.54NCZO ceramic composite exhibited excellent magnetodielectric properties with an effective permittivity of about 8.3, a dielectric loss of 0.003, a permeability of 7 and a magnetic loss of 0.024 (@10 MHz), which make it potentially applicable in the miniaturization of electronic devices.
研究领域:
材料科学
·
电气工程
·
陶瓷
·
复合材料
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2025
·Vol. 36
·期 33
·2137
·
IF 2.8
Zeng Fanjun,Meng Liufang,Yuan Changlai,Zhu Baohua,Liu Xiao,Xiao Hequn,Wu Jianwang,Zhou Changrong,Chen Guohua
With the rapid development of 5G communication technology, higher requirements have been imposed on microwave dielectric ceramic materials. Ceramic materials with low dielectric constant, excellent temperature stability, and low sintering temperature have become current research focus. In this study, (1- x )Li 2 MoO 4 - x BaV 2 O 6 (LM- x BV, x = 0.7, 0.78, 0.8, 0.9) ceramics were successfully prepared via the solid-state reaction method, and their microstructures, microwave dielectric properties and antenna simulation were investigated. XRD and Raman spectroscopy confirmed the coexistence of BaV 2 O 6 , BaMoO 4 and LiVO 3 phases in all LM-BV systems. Bulk density, Q × f and τ f values approximately increased, and ε r decreased, with BV contents increased at optimum sintering temperature. LM-0.8BV ceramic was obtained with excellent microwave dielectric properties of ε r = 9.32, Q × f = 11246.3 GHz and τ f = 2.8 ppm/ ℃. The DRA designed based on Li 2 MoO 4 -0.8BaV 2 O 6 ceramics demonstrated excellent performance at 7.88 GHz, including a return loss of ~ -33.51 dB, high efficiency (~ 95%), a peak gain of ~ 7.3 dB, and a bandwidth of 500 MHz. These results indicated that the material had promising potential for applications in microwave devices within Low-Temperature Co-fired Ceramic (LTCC) technology.
研究领域:
材料科学
·
微波工程
·
陶瓷材料
·
5G通信技术
·
天线设计
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2026
·
IF 6
Shujing Pan,Kaiming Kan,Mengyu Zhang,Wenzhi Su,Yong Zou,Shoujun Ding
Long-wave-pass (LWP) optical filters based on single crystals offer superior thermal stability and high-power handling capability compared to conventional thin-film systems. In this work, high-quality Cr 6+ -doped Li 2 MoO 4 single crystals with varying dopant concentrations were successfully grown by the Czochralski method. Structural characterization confirms that the crystals retain a trigonal phase, with Cr ions predominantly substituting for Mo sites in the lattice in the +6 oxidation state. Optical measurements reveal that the absorption cutoff wavelength can be continuously tuned from 300 to 530 nm by adjusting the Cr 6+ concentration, while maintaining high transmittance in the long-wavelength region. First-principles calculations demonstrate that the incorporation of Cr 6+ introduces localized Cr-3d states within the bandgap, leading to effective bandgap narrowing and tunable optical response. In addition, the crystals exhibit favorable thermal conductivity and mechanical properties, supporting their suitability for high-power optical applications. These results establish Cr 6+ -doped Li 2 MoO 4 single crystals as promising candidates for thermally robust and spectrally tunable LWP optical filters.
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2022
·
IF 6.364
Xiaomeng Li,Xian Xue,Qiyin Lin,Zeming Qi,Hong Wang,Yingying Zhao,Jing Guo
Temperature stable xLi 2 MoO 4 -(1-x)(LiBi) 0.5 MoO 4 (x = 0, 40, 50, 60, 70, 100 vol%) microwave dielectric ceramics obtained by cold sintering process (CSP) under a mild sintering condition (120 ℃/30 min/200 MPa) are introduced in this work. The XRD , SEM, and Raman analysis indicate the coexistence of Li 2 MoO 4 and (LiBi) 0.5 MoO 4 phases. Li 2 MoO 4 -(LiBi) 0.5 MoO 4 ceramics are compatible with Ag and Al electrode materials under cold sintering condition. The specimens exhibit high relative densities and good microwave dielectric properties (relative permittivities: 31.5–5.5; Q×f values: 1900 - 18,500 GHz; TCF values: from +144 ppm/℃ to −106 ppm/℃), in particular, TCF = +0.7 ppm/℃ can be obtained in the case of x = 50 vol%. The extrapolated microwave dielectric properties obtained by the fitted infrared reflectivity spectrum are close to the measured data, revealing that the dielectric responses of cold sintered Li 2 MoO 4 -(LiBi) 0.5 MoO 4 ceramics in the microwave range are dominated by the polar optical phonons.
研究领域:
材料科学
·
陶瓷
·
微波工程
·
固体物理
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）