Materials
·
2020
·Vol. 13
·期 23
·5528
·
IF 3.057
Bolong Hong,Xiangming He,Huihua Yi,Chenglin Hu
LiMnBO3is a potential cathode for Li-ion batteries, but it suffers from a low electrochemical activity. To improve the electrochemical performance of LiMnBO3, the effect of polyvinyl pyrrolidone (PVP) as carbon additive was studied. Monoclinic LiMnBO3/C and LiMnBO3-MnO/C materials were obtained by a solid-state method at 500 °C. The structure, morphology and electrochemical behavior of these materials are characterized and compared. The results show that carbon additives and ball-milling dispersants affect the formation of impurities in the final products, but MnO is beneficial for the performance of LiMnBO3. The sample of LiMnBO3-MnO/C delivered a high capacity of 162.1 mAh g−1because the synergistic effect of the MnO/C composite and the suppression of the PVP coating on particle growth facilitates charge transfer and lithium–ion diffusion.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2021
·
IF 3.785
Baichuan Han,Pengfeng Jiang,Shuai Li,Xia Lu
Inorganic solid-state electrolytes have high ionic conductivity and stability, which demonstrate the promising application in building solid batteries excepting their poor interface compatibility. Hence, making the solid electrolytes flexible, such as the combination with polymer is an important strategy in mitigating such problem. In this context, a robust membrane is fabricated with nanosized Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 particles being filled into the porous PVDF-HFP as gel polymer electrolyte (GPE). This membrane displays a high ionic conductivity of 3.57 × 10 −4 S cm −1 , a large Li-ion transference number of 0.62, as well as the good mechanical strength and thermal stability. The as prepared Li/GPE/Li symmetric cell demonstrates an underlying electrochemical activation in stabilizing the membrane-electrode interface, which seems to be balancing the trade-off between the Li diffusion and side reactions at the interface. The fabricated LiFePO 4 |GPE|Li coin cell delivers a high Coulombic efficiency of 98%, a good rate capability at 2C (about 120 mAh g −1 ) and capacity retention of 92% after 110 cycles (150 mAh g −1 , 0.4C) at room temperature. This important design provides a rewarding avenue to address the interface compatibility and develop composite electrolytes for high performance Li metal batteries .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials
·
2021
·Vol. 14
·期 13
·3624
·
IF 3.623
Zhijie Xu,Fangxu Hu,De Li,Yong Chen
In the late 1960s, the establishment of Prigogine’s dissipative structure theory laid the foundation for the (electro)chemical oscillation phenomenon, which has been widely investigated in some electrochemical reactions, such as electro-catalysis and electro-deposition, while the electrochemical oscillation of Li-ion batteries has just been discovered in spinel Li4Ti5O12a few years before. In this work, spinel LiCrTiO4samples were synthesized by using a high-temperature solid-state method, characterized with SEM (Scanning electron microscope), XRD (X-ray diffraction), Raman and XPS (X-ray photoelectron spectroscopy) measurements, and electrochemically tested in Li-ion batteries to study the electrochemical oscillation. When sintering in a powder form at a temperature between 800 and 900 °C, we achieved the electrochemical oscillation of spinel LiCrTiO4during charging, and it is suppressed in the non-stoichiometric LiCrTiO4samples, especially for reducing the Li content or increasing the Cr content. Therefore, this work developed another two-phase material as the powder-sintered LiCrTiO4exhibiting the electrochemical oscillation in Li-ion batteries, which would inspire us to explore more two-phase electrode materials in Li-ion batteries, Na-ion batteries, etc.Keywords:Li-ion battery;LiCrTiO4;electrochemical oscillation;phase transition;spinel structure
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2022
·Vol. 105
·期 10
·6407-6416
·
IF 4.186
Hao Guo,Yanli Shi,Hailiang Wang,Ruichong Chen,Diyin Ye,Qiwu Shi,Jianqi Qi,Zhijun Liao,Tiecheng Lu
Li 2 TiO 3 has a broad stoichiometric range and wide application prospects such as cathode, tritium breeder, and microwave dielectric materials. Particularly, Li 2 TiO 3 shows a faster tritium release performance and exceptional chemical and radiation stabilities, making it one of the most promising solid breeder materials. Li-rich Li 2 TiO 3 has been developed for years as an advanced breeder material due to its enhanced tritium production and better stability in hydrogen atmosphere. However, the defect chemistry responsible for accommodating excess Li and how the non-stoichiometry improves the material's performance is still unclear. In this work, the crystal structure and non-stoichiometry-induced defects in Li-rich Li 2 TiO 3 were investigated by means of X-ray diffraction, electron spin resonance, and X-ray photoelectron spectroscopy. Results show that oxygen vacancies and cation disorder both play a major role in the incorporation of excess Li. The sintering atmosphere (air/vacuum) has a negligible effect on the formation of the non-stoichiometry-induced defects but will influence the concentration of the oxygen vacancies. The better stability in the reduction atmosphere may be ascribed to the oxygen vacancies inside the Li-rich Li 2 TiO 3 crystals.
研究领域:
材料科学
·
核能工程
·
固体化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Jianfeng Jia,Chuhao Tan,Mengchuang Liu,De Li,Yong Chen
In Li-ion batteries, memory effect has been found in several commercial two-phase materials as a voltage bump and a step in the (dis)charging plateau, which delays the two-phase transition and influences the estimation of the state of charge. Although memory effect has been first discovered in olivine LiFePO4, the origination and dependence are still not clear and are critical for regulating the memory effect of LiFePO4. Herein, LiFePO4 has been synthesized by a home-built spray drying instrument, of which the memory effect has been investigated in Li-ion batteries. For as-synthesized LiFePO4, the memory effect is significantly dependent on the relaxation time after phase transition. Besides, the voltage bump of memory effect is actually a delayed voltage overshooting that is overlaid at the edge of stepped (dis)charging plateau. Furthermore, we studied the kinetics of LiFePO4 electrode with electrochemical impedance spectroscopy (EIS), which shows that the memory effect is related to the electrochemical kinetics. Thereby, the underlying mechanism has been revealed in memory effect, which would guide us to optimize two-phase electrode materials and improve Li-ion battery management systems.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Science Advances
·
2026
·Vol. 12
·期 25
·
IF 13.9
Xingwu Zhai,Yuchun Liu,Mi Luo,Tianchen Wei,Hang Wang,Jing Zhang,Leyi Su,Zhaodi Fan,Zhixin Sun,Zhuohui Zhang,Liang Wu,Hongjun Zhang,Bangjiao Ye,Min Zhou
The slow kinetics of lithium carbonate (Li 2 CO 3 ) nucleation/decomposition hinder voltage gap minimization in lithium-carbon dioxide (Li-CO 2 ) batteries. Although symmetry-broken cation motifs can enhance reactivity, designing optimal catalysts remains challenging. Moving beyond cation-centric views, we recognize anions as active participants that regulate charge and stabilize intermediates, yet their degradation worsens the activity-stability trade-off. To address this, we develop a dual Φ descriptor quantifying anion-cation orbital coupling and reconstruction energy. It establishes a volcano correlation with the voltage gap in metal sulfides, showing that symmetry-broken units optimally balance binding and stability. Guided by this, we synthesize oriented WS 2 rich in C 4v configurations, achieving a record-low gap of 0.76 volts and superior cycling (>1268 hours) among dichalcogenides. This work shifts the paradigm from cation-only tuning to synergistic anion-cation design, repositioning anions as co-catalytic architects. By linking orbital insights to performance, we provide a universal descriptor for developing efficient, stable Li-CO 2 batteries.
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2026
·
IF 3.1
Zhang Yanxin,Sun Zhenying,Liu Xuehua,Zhang Chuan,Liu Zhongzhu,Lin Chunfu
Niobate Li + -storage anode materials, especially TiNb 2 O 7 (TNO), have garnered significant attention for their intrinsically safe characteristics and substantial capacities as well as fast and stable electrochemical kinetics. However, several limitations hinder the application of TNO in lithium-ion battery anodes, chief among them being its high niobium content. Herein, by adjusting the ratio of Ti and Nb elements in TNO, a novel low-niobium Ti 1.3 Nb 1.76 O 7 (LN-TNO) anode material with a micro-sized porous spherical morphology and oxygen-vacancy proportion of 2.8% has been exploited. The oxygen vacancies provide more active sites for electrochemical reactions, enabling impressive rate capability with a 5 C to 0.1 C capacity retention of 70.4%. LN-TNO demonstrates stable cycling performance with 86.5% capacity retention after 250 cycles at 5 C. Even at − 10 °C, it delivers a super high-rate behavior with 46.7% capacity retention from 5 C to 0.1 C, along with stable cycling performance retaining 90.0% of its capacity upon 500 cycles at 5 C. Owing to the outstanding properties mentioned above, LN-TNO demonstrates promising potential for practical applications in high-performance Li + storage. Graphical abstract The alternative text for this image may have been generated using AI.
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2026
·
IF 16.6
Junwu Sang,Borui Liu,Shanshan Jiang,Suzhe Liang,Tingting Liu,Kaiyong Tuo,Hongrui Huang,Luting Xie,Yuran Yu,Guosheng Shao,Xueliang Sun,Changhong Wang
Tellurium (Te), with high volumetric capacity (2621 mAh cm–3) and decent electronic conductivity (2000 mS cm–1), has emerged as a promising cathode material for future lithium metal batteries. However, all-solid-state batteries (ASSBs) with Li–Te chemistry remain largely unexplored. Here, we construct a nanostructured Te91@LPSC-350 composite in which ∼10 nm Te domains are uniformly embedded within an amorphous Li5.5PS4.5Cl1.5 (LPSC) matrix, featuring an ultrahigh Te content of 91 wt % and intimate solid–solid contact. This nanocomposite exhibits high electronic conductivity (121 mS cm–1) and appreciable ionic conductivity (0.1 mS cm–1, after lithiation), enabling ultrafast and highly reversible Te redox reactions in the solid-state. Resultantly, ASSBs with the Te91@LPSC-350 nanocomposite cathode deliver their theoretical capacity of 420 mAh g–1 at 0.25 mA cm–2, maintain ultralong cycling stability over 13,000 cycles at 12.5 mA cm–2, and achieve a high areal capacity of 21 mAh cm–2. Furthermore, all-solid-state Li–Te pouch cells with an energy density of 1100 Wh L–1 (based on Li and Te91@LPSC-350) retain 81% of their initial capacity after 200 cycles under 2.5 MPa. Notably, Te can be directly recovered by exploiting its 100% selectivity in a vaporization–condensation process. These results demonstrate that all-solid-state Li–Te batteries are a safe, energy-dense, and sustainable energy storage technology.
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Yu Wu,Wenting Ji,Zhihua Xu,Yuqin Huang,De Li,Yuanchuan Li,Yong Chen
In Li-ion batteries (LIBs), the phenomenon of memory effect has only been found in a few two-phase electrode materials such as olivine LiFePO4, anatase TiO2, and Al-doped Li4Ti5O12, which is attributed to the Li-ion exchange between adjacent vacant Li and Fe sites in LiFePO4 and the Al-ion exchange between 8a and 16c sites in Al-doped Li4Ti5O12. Here, the Al-doped LiCrTiO4 was successfully synthesized by the spray-drying method and high-temperature sintering, which also exhibits the memory effect during only the charging process. The X-ray diffraction (XRD) and electrochemical results indicate that the saturated Al-doping level corresponds to the Al:Ti ratio of ca. 0.25 for LiCrTiO4, and the memory effect increases with the Al-doping level evidently. According to the in situ XRD and magic-angle spinning nuclear magnetic resonance results, the Al3+ ions are doped at the 8a sites, the Li ions hop between 8a and 16c sites during the charging and discharging processes, and the Li ions further hop from the 16c site to the 16d site after deeply discharging and move back in the subsequent charging process. Therefore, the memory effect of Al-doped LiCrTiO4 should originate from the reversible exchange of Li ions between 16c and 16d sites, and it is a common strategy to cause the memory effect in LIBs by inducing another reversible ionic migration in the electrode materials to affect the normal Li-ion extraction/insertion.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-9
·
IF 15.7
Zhou Yin,Yin Kun,Huang Yingying,Li Jiapei,Zhu Anquan,Lin Dewu,Gan Guoqiang,Zhang Jianfang,Liu Kai,Zhang Tian,Liu Kunlun,Luan Chuhao,Yang Huawei,Chen Hou,Guo Shaojun,Zhang Wenjun,Hong Guo
Charge overpotential for oxygen evolution reaction is a crucial parameter for the energy conversion efficiency of lithium-oxygen (Li-O 2 ) batteries. So far, the realization of low charge overpotential via catalyst design is a grand challenge in this field, which usually exceeds 0.25 V. Herein, we report an orbital reconstruction strategy to significantly decrease the charge overpotential to the low 0.11 V by employing PdCo nanosheet catalyst under a low-loading mass (0.3 mg/cm 2 ) and capacity (0.3 mAh/cm 2 ). Experimental and theoretical calculations demonstrate that the precise d-d orbital coupling ( d xz - d xz , d yz - d yz and d z 2 - d z 2 ) between the low-electronegativity Co and Pd leads to the reconstruction of Pd 4 d orbitals in PdCo nanosheets, thereby resulting in a downward shift of all the three active Pd 4 d orbitals ( d z 2 , d xz and d yz ) relative to that of Pd nanosheets. Furthermore, the highest energy level of the Pd 4 d z 2 orbital in PdCo is lower than the lowest energy levels of the Pd 4 d xz and 4 d yz orbitals in pure Pd, significantly decreasing the charge activation energy and achieving a highest energy conversion efficiency of 91%. This finding provides the orbital-level tuning into rational design of highly efficient electrocatalysts for Li-O 2 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2025
·
IF 7.9
Shasha Guo,Mohamed Ait Tamerd,Jiayi Li,Jianwei Wu,Xinyue Shi,Chih-Wen Pao,Zhiwei Hu,Jiwei Ma
Magnetite (Fe 3 O 4 ) is a potential anode for high-energy-density lithium-ion batteries thanks to its high theoretical capacity and cost-effectiveness. Yet, the capacity decay and limited kinetics induced by the structure damage along the conversion process need to be emphasized before its practical application. In this study, we propose an intrinsic modulation of Fe 3 O 4 using fluorine doping to considerably boost the cycle stability and rate capability. Benefiting from the enlarged metal-anion distance and improved electronic conductivity induced by the fluorine dopants, the as-prepared Fe 3 O 3.94 F 0.06 anode provides a low-energy-barrier path for the Li + intercalation, which is responsible for the enhanced kinetics. The present study emphasizes the essential role of anion modification on conversion-type transition metal oxides that enable boosting the electrochemical performance towards high-energy-density battery applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Hancheng Yuan,Nan Wang,Yanna NuLi,Jun Yang,Jiulin Wang
Based on a displacement reaction mechanism, Cu 2 Se is a good candidate for non-insertion-based cathode materials of rechargeable magnesium batteries . Nevertheless, its relatively low electronic conductivity leads to a poor rate capability and an unsatisfactory cycling performance. In this work, we firstly reported the improved electrochemical performance of Cu 2 Se cathode based on displacement reaction for Mg batteries triggered by a Li salt additive in a typical magnesium electrolyte 0.4 mol dm −3 (PhMgCl) 2 -AlCl 3 /THF. Cu 2 Se materials with different morphologies and particle sizes were synthesized by a solvothermal process and a hydrothermal method , respectively. Cu 2 Se with smaller particle sizes by the hydrothermal method exhibits a higher specific capacity (152.7 mAh g −1 first discharge capacity at 0.02 C) but poor cycling performance in 0.4 mol dm −3 (PhMgCl) 2 -AlCl 3 /THF electrolyte. LiCl was added in the magnesium electrolyte to promote the displacement reaction of the Cu 2 Se material. An initial discharge capacity of approximately 239.7 mAh g −1 with 48.4% capacity retention after 20 cycles at 0.1 C can be obtained for Cu 2 Se in 0.4 mol dm −3 (PhMgCl) 2 -AlCl 3 +1.0 mol dm −3 LiCl/THF electrolyte. Furthermore, the cycling performance and rate capability are enhanced by in situ homogeneously anchoring Cu 2 Se particles onto the surface of the reduced graphene oxide (rGO) nanosheets . Cu 2 Se/rGO composite with 10 wt% rGO exhibits 64.2% capacity retention after 20 cycles at 0.1 C, and a more than 120 mAh g −1 reversible capacity at 0.2 C in the hybrid Mg 2+ /Li + electrolyte.
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
危险品化学品经营许可证（带存储）