JOURNAL OF ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Jie Chen,Wenhao Fan,Yachao Wang,Yu Jiang,Saneyuki Ohno,Zuhair A. Munir,Marhoun Ferhat,Shaoping Chen
In this study we investigated the nature and stability of the interfaces between Mg 2.05 Si 0.98 Bi 0.02 as the TE material and Ni and Mg 50 Si 15 Ni 50 as barriers. Single-leg devices of Ni/TE/Ni and Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 were prepared by the SPS process in one step and were then subjected to different aging conditions. Using Mg 50 Si 15 Ni 50 as barrier provided a more stable interface with no evidence of an interaction layer. This contrasted with the case when Ni was used as a barrier. The efficiency, η , and the power output, P out , were higher when Mg 50 Si 15 Ni 50 was used as a barrier. The Ni/TE/Ni and Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 devices were aged at 673 K for up to 480 h under vacuum and an Mg vapor. For the Mg 50 Si 15 Ni 50 /TE/Mg 50 Si 15 Ni 50 device, the Seebeck coefficient, the efficiency, and power output showed no change with aging time when aging was carried out under in an Mg vapor. The present observations showed that a stable interface can be attained when Mg 50 Si 15 Ni 50 is used as a barrier for the Mg 2.05 Si 0.98 Bi 0.02 TE material .
研究领域:
材料科学
·
热电学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Biyi Xu,Wenlong Li,Huanan Duan,Haojing Wang,Yiping Guo,Hua Li,Hezhou Liu
This paper proposes a strategy to stabilize the garnet/Li interface by introducing Li 3 PO 4 as an additive in garnet-type Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 . The Li 3 PO 4 -added Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 electrolyte exhibits a room-temperature Li-ion conductivity of 1.4 × 10 −4 S cm −1 , which is less than that of the Li 3 PO 4 -free counterparts (4.6 × 10 −4 S cm −1 ). However, the presence of Li 3 PO 4 improves the interfacial compatibility and suppresses Li-dendrite formation during Li-metal plating/stripping. The symmetric Li/garnet/Li cells with Li 3 PO 4 -added Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 have been successfully cycled at a current density of 0.1 mA cm −2 at 60 °C for 60 h; on contrast, the control cells with Li 3 PO 4 -free Li 6.5 La 3 Zr 1.5 Ta 0.5 O 12 display noisy potential with large voltage polarization and get short-circuited completely after 33-h cycling under the same operating condition. The outstanding interface stability can be attributed to the in situ reaction of the Li flux with Li 3 PO 4 to form a self-limiting and ion-conducting interphase, Li 3 P, which is confirmed experimentally.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Energy Materials
·
2018
·Vol. 8
·期 16
·1702374
·
IF 21.875
Yijie Liu,Chao Li,Bojie Li,Hucheng Song,Zhu Cheng,Minrui Chen,Ping He,Haoshen Zhou
Solid-state Li batteries using Na + superionic conductor type solid electrolyte attracts wide interest because of its safety and high theoretical energy density. The NASCION type solid electrolyte LAGP (Li 1. 5 Al 0.5 Ge 0.5 P 3 O 12 ) shows favorable conductivity as well as good mechanical strength to prevent Li dendrite penetration. However, the instability of LAGP with Li metal remains a great challenge. In this work, an amorphous Ge thin film is sputtered on an LAGP surface, which can not only suppress the reduction reaction of Ge 4+ and Li, but also produces intimate contact between the Li metal and the LAGP solid electrolyte. The symmetric cell with the Ge-coated LAGP solid electrolyte shows superior stability and cycle performance for 100 cycles at 0.1 mA cm −2 . A quasi-solid-state Li–air battery has also been assembled to further demonstrate this advantage. A stable cycling performance of 30 cycles in ambient air can be obtained. This work helps to achieve a stable and ionic conducting interface in solid-state Li batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Nature Communications
·
2020
·Vol. 11
·期 1
·1-10
·
IF 12.121
Yang Ya-Nan,Li Ying-Xiang,Li Yi-Qiu,Zhang Tao
Lithium garnets have been widely studied as promising electrolytes that could enable the next-generation all-solid-state lithium batteries. However, upon exposure to atmospheric moisture and carbon dioxide, insulating lithium carbonate forms on the surface and deteriorates the interfaces within electrodes. Here, we report a scalable solid sintering method, defined by lithium donor reaction that allows for complete decarbonation of Li 6.4 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) and yields an active LiCoO 2 layer for each garnet particle. The obtained LiCoO 2 coated garnets composite is stable against air without any Li 2 CO 3 . Once working in a solid-state lithium battery, the LiCoO 2 -LLZTO@LiCoO 2 composite cathode maintains 81% of the initial capacity after 180 cycles at 0.1 C. Eliminating CO 2 evolution above 4.0 V is confirmed experimentally after transforming Li 2 CO 3 into LiCoO 2 . These results indicate that Li 2 CO 3 is no longer an obstacle, but a trigger of the intimate solid-solid interface. This strategy has been extended to develop a series of LLZTO@active layer materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2025
·
IF 14.9
Zhen Wang,Jun-Ke Liu,Li Deng,Jian Liu,Zhi-Liang Jin,Yu-Xi Luo,Guo-Dong Bai,Wen-Jing Sun,Gao-Yang Bai,Jing-Yi Lin,Zu-Wei Yin,Yao Zhou,Jun-Tao Li
Extending the charging voltage of LiCoO 2 (LCO) is an ongoing and promising approach to increase its energy density. However, the main challenge of the approach lies in the insuperable cathodic interfacial processes at high voltage, which leads to rapid failure both in the performance and structure of the LCO cathode. Herein, a Li 2 CO 3 -based additive was prepared by a simple sand-milling method, enabling a low electrochemical decomposition voltage <4.6 V from commonly >4.8 V, stabilizing the interface of the LCO cathode at 4.6 V. The decomposition of Li 2 CO 3 provides extra Li + and CO 2 to supplement the Li consumption required in the initial irreversible interfacial reactions and rapidly form a uniform and stable cathode electrolyte interphase layer (less organic and more inorganic components) on the LCO cathode by reducing CO 2 . Thus, the phase transformation and the emergence of high-valent Co ions on the surface of LCO at 4.6 V high voltage were inhibited. Thanks to this, with 2% Li 2 CO 3 -based additive, the capacity retention of commercial LCO at a high voltage of 4.6 V at 0.5 C for 100 cycles was improved from 59.3% to 79.3%. This work improves the high-voltage stability of LCO and provides a new idea for realizing the high-voltage operation of batteries.
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 POWER SOURCES
·
2023
·
IF 9.2
Mengyuan Song,Changhao Tian,Chunguang Chen,Tao Huang,Aishui Yu
Lithium-oxygen batteries show great energy storage potential due to their high energy density . However, it is difficult for conventional liquid electrolytes to form a stable solid electrolyte interface (SEI) on cathode surface to ensure long-term stable cycling of lithium-oxygen batteries . Herein, LiBOB is added to the LiTFSI-based electrolyte to solve the above-mentioned problems. By introducing LiBOB into LiTFSI single-salt electrolyte system, the electron delocalization of the BOB − anion induces the dissociation equilibrium of the lithium salt to occur positively and the formed electrolyte exhibits good ionic conductivity . Different amounts of LiBOB show different characteristics in electrochemical performance. Trace amounts of LiBOB as an additive increase the solvation of Li + and improve the discharge capacity of the cell. Furthermore, the synergistic effect of the LiTFSI-LiBOB dual-salt electrolyte forms a protective SEI when LiBOB has a larger proportion of lithium salts in the electrolyte, resulting in comparable cycling performance. This work demonstrates a promising approach to design electrolytes for long-term stable cycling of lithium-oxygen batteries.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Chao Sun,Bing Zhao,Ru-de Cui,Jing Mao,Ke-Hua Dai,He-Zhang Chen,Xia-hui Zhang,Jun-chao Zheng
Due to high volumetric energy density, the major market share of cathode materials for lithium-ion batteries is still dominated by LiCoO2 (LCO) at a 3C field. However, a number of challenges will be triggered if the charge voltage is increased from 4.2/4.3 to 4.6 V to further increase energy density, such as a violent interface reaction, Co dissolution, and release of lattice oxygen. Here, LCO is coated with the fast ionic conductor Li1.8Sc0.8Ti1.2(PO4)3 (LSTP) to form LCO@LSTP, while a stable interface of LCO is in situ constructed by the decomposition of LSTP at the LSTP/LCO interface. As decomposition products of LSTP, Ti and Sc elements can be doped into LCO and thus reconstruct the interface from a layered structure to a spinel structure, which improves the stability of the interface. Moreover, Li3PO4 from the decomposition of LSTP and remaining LSTP coating as a fast ionic conductor can improve Li+ transport when compared with bare LCO, and thus boost the specific capacity to 185.3 mAh g–1 at 1C. Benefited from the stable interface and fast ion conducting coating, the LCO@LSTP (1 wt %) cathode delivers a high capacity of 202.3 mAh g–1 at the first cycle (0.5C, 3.0–4.6 V), and shows a higher capacity retention of 89.0% than LCO (50.9%) after 100 cycles. Furthermore, the change of the Fermi level obtained by using a kelvin probe force microscope (KPFM) and the oxygen band structure calculated by using density functional theory further illustrate that LSTP supports the performance of LCO. We anticipate that this study can improve the conversion efficiency of energy-storage devices.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2025
·
IF 3.9
Shuai Tang,Qiang Jiang,Yu Shi,Liang Zhang,Jun Li,Xuhui Jiang,Peng Zou,Zhang Luo
Thermally regenerative batteries have promising applications in low-temperature waste-heat recovery, but ammonia crossover severely reduces battery power generation and its stability. To address this issue, a membrane-less self-stratified thermally regenerative flow battery was constructed to alleviate ammonia crossover. The interface visualization, power generation feasibility, and the effects of flow rate were investigated. The results reveal that the density difference of the anolyte/catholyte leads to self-stratification. The interface moves continually due to ammonia diffusion in the static catholyte, resulting in a significant decrease in the battery performance. By regulating the catholyte flow rate, a steady anode–cathode interface can be achieved, thereby solving the key problem of ammonia crossover and achieving stable power generation. Increasing the catholyte flow rate can produce a stable interface and prevent the interface from moving to the cathode. However, a high catholyte flow rate will allow the interface to surpass the anode electrode, causing battery performance to increase and then decrease with flow rate. Increasing the ammonia flow rate can effectively improve the anode mass transfer and battery performance. The interface is affected by temperature change, so the interface is investigated at different temperatures. Within a specific range, there is no significant change in the position of the interface, and the battery’s maximum power density improves linearly with temperature.
研究领域:
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Pengfei Wang,Yan Meng,Yujue Wang,Lu Chen,Zhaokun Zhang,Wei Pu,Jianming Li,Chi Yang,Dan Xiao
LiCoO 2 with a cut-off voltage of 4.6 V (versus Li/Li + ) could increase by about 28% of energy density compared with the commercial 4.45 V LiCoO 2 cathode. However, severe issues such as oxygen evolution and dramatic phase transition strangle the practical application of 4.6 V LiCoO 2 . We herein develop a one-step wet chemical coating method at room temperature to stabilize the interface of LiCoO 2 under high voltage. Through the treatment of LiCoO 2 particles by LiAlH 4 solution, the oxygen framework of the surface was reconstructed forming a composite coating layer which is featured a morphology with an inside-out transition structure from order to disorder. Benifited from the Al-containing composite layer, an excellent cycling performance has been obtained on the treated commerical samples, delivering a capacity retention of 70.4% even after 1000 cycles. The key to the improvement of electrochemical performance is to restrain the loss of lattice oxygen which is further elucidated by the results from differential electrochemical mass spectroscopy (DEMS). The interface evolution in different depths was carefully investigated delineating the relationship between the fluorated interface and the enhanced performance. Since the introduction of aluminum hydroxide , it facilitates the capture of F − bringing the interface layer from oxide to more stable fluoride during the cycling. Combining with the first principles calculation results, the aluminum coating surface suppresses the evolution of surfacial oxygen confirmed by oxygen release energy, and the optimized models infer that the fluorinated layer can obviously stabilize the interface structure of LiCoO 2 . This study provides a direct coating method which confers a notable improvement on cycling stability of LiCoO 2 under high voltage and enables the implementation of high energy storage applications .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2025
·
IF 8.5
Lida Wu,Yitong Jiang,Chong Chen,Weibo Zhang,Jiayue Guo,Siyuan Liu,Pengjie Wang,Fazheng Ren,Baocai Xu,Yao Hu
The inherent propensity for aggregation necessitates the use of high concentrations of protein-polysaccharide nanoparticles to achieve stable Pickering emulsions. This study employed xanthan gum (XG) to mitigate the pronounced aggregation of zein nanoparticles by structure construction, thereby enhancing the emulsifying efficiency of zein/XG (Z/XG) nanoparticles. The Z/XG nanoparticles displayed significantly enhanced dispersity, with the absolute ζ-potential increasing from 6.25 mV to approximately 55 mV as the zein/XG ratio was optimized from 1:0 to 1:0.2. The Z/XG nanoparticles exhibited core–shell structure with zein as the core and XG as the shell, facilitated by electrostatic interactions. This structural transformation enables Z/XG nanoparticles to more readily adsorb at the oil-water interface. The addition of excess XG can further augment the stability of Z/XG emulsions due to the formation of XG networks in the continuous phase preventing the coalescence of oil droplets. It was demonstrated that a low concentration of 0.4 % Z/XG nanoparticles is sufficient to maintain emulsion stability under typical conditions of heating, pH, and ionic treatments. Overall, this study has developed a highly effective strategy to overcome the application challenges associated with protein-polysaccharide Pickering emulsions, broadening their potential applications in the food, cosmetic, and pharmaceutical industries.
研究领域:
食品科学
·
材料科学
·
生物化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Zhonghui Gao,Jiayi Yang,Haiyang Yuan,Haoyu Fu,Yutao Li,Yuyu Li,Thimo Ferber,Conrad Guhl,Huabin Sun,Wolfram Jaegermann,René Hausbrand,Yunhui Huang
Most Li+/Na+-conducting solid electrolytes are unstable in moisture, and the formed hydroxides and carbonates on their surfaces result in the increase of the interfacial resistance between solid electrolytes and alkali metal anodes. In this study, heat treatment was used to remove the byproduct coating on the surface of Na3Zr2Si2PO12 (NZSP) that also leads to the generation of Na-ion deficient surface simultaneously. This surface chemistry approach was used to reduce the interfacial resistance and suppress Na-dendrite growth during Na plating. A combination of the metallic Na wetting test, density functional theory, and electrochemical measurement was employed to investigate the origins of ultralow interfacial resistance and mechanism between the Na-ion deficient surface and the metallic Na anode. The analysis demonstrates that the Na-ion-deficient surface effectively improves the contact between NZSP and the metallic Na anode. Moreover, an ultrathin passivating layer involving Na2O was formed between NZSP with metallic Na that protected the NZSP electrolyte from the reduction by metallic Na. This study not only motivates the need for further understanding of the surface chemistry of NZSP but also provides guidelines for the future design of the Na-ion solid–electrolyte interface.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 11
·2102121
·
IF 6.389
Zelin Liu,Song Chen,Guangyong Zhang,Hang Shi,Xiaochan Chen,Wei Shi,Lan Liu
Even though intrinsically stretchable liquid metals (LMs) have been widely used in the stretchable electrodes for improving the stretchability, it is still challenging to achieve stable interfaces in these electrodes. A usual approach of adhering the LMs on a substrate is to modify the LMs with an organic surfactant, which is easily ruptured under a dynamic deformation. Herein, a surface-embedded silver and its selective alloying of LMs are reported to address this problem. Typically, the surface-embedding structure and the alloying interaction are both robust and stretchable, enabling the high interfacial stability during deformation (the ability to resist peeling, scratching, and sonication). And the cracked silver layer under tensile strains can be well bridged by LMs, enabling the good conducting stability during deformation (resistance change of 0.076 at 50% strain, 0.18 at 100% strain, and 0.4 at 200% strain). It is noted that this interfacial engineering can be facilely organized by directly printing or writing, which is convenient for preparing customized electrodes and circuits. At last, a light-emitting diode array and a drone remote controller are assembled using the stretchable electrodes, showing their advantages in practical application.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）