JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Shidong Song,Limei Yu,Yanli Ruan,Jian Sun,Butian Chen,Wu Xu,Ji-Guang Zhang
Irreversible parasitic reactions and the resulting accumulation of insulating side products are main barriers for practical application of rechargeable lithium–oxygen (Li O 2 ) batteries . Therefore, it is critical to develop multifunctional oxygen electrodes suitable for oxygen reduction reaction , oxygen evolution reaction , and decomposition of side reaction products. Here we report the application of ultrafine ruthenium on boron carbide (Ru/B 4 C) with highly efficient multifunctional activities as carbon-free oxygen electrodes for Li O 2 batteries. Li 2 CO 3 and LiOH can be completely decomposed by Ru/B 4 C at 4.0 V and 4.1 V, respectively, within the stability window of the electrolyte. A Li O 2 battery using the Ru/B 4 C oxygen electrode achieves low overpotentials for Li O 2 reactions, and excellent cycling performance under the capacities of 300 and 500 mAh g −1 Ru/B4C . In-situ gas chromatography analysis reveals that O 2 is the major gas product during charging. Only a negligible amount of CO 2 is observed in the first charging process. Therefore, Ru/B 4 C can be a very promising oxygen-electrode material for Li O 2 batteries and Li–air batteries operated in ambient air.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
APPLIED ORGANOMETALLIC CHEMISTRY
·
2024
·Vol. 38
·期 11
·e7658
·
IF 3.7
Shuming Yu,Hao Zhao,Yuxin Wang,Xiaoshi Lang,Tan Wang,Tingting Qu,Lan Li,Chuangang Yao,Kedi Cai
Adjusting the morphology and structure of the catalyst to optimize the structure of the discharge product is an effective strategy for improving the electrocatalytic activity of lithium–oxygen batteries (LOBs). In this paper, a novel high-orientation layered manganese-based metal–organic frameworks (Mn-MOFs) catalyst for the air cathode of a LOB is synthesized via a facile solvothermal method using 2,4-pyridine dicarboxylic acid combined with the metal Mn 2+ ion. The presence of layered structure increases the specific surface area of the catalytic material, and the interlayer spacing can be used as a channel for electron and oxygen transport, thus promoting ion diffusion and catalyzing reactions. Otherwise, the coordination of the N element and metal ion in the organic ligand significantly improves the electrical conductivity and oxygen reduction reaction/oxygen extraction reaction (ORR/OER) performance of LOB. The effective combination of Mn 2+ and 2,4-pyridine dicarboxylic acid improves the overall catalytic capacity of the material, leading to a high LiO 2 adsorption capacity so as to induce the formation of film discharge products and extend the cycle life of LOBs. When using Mn-MOFs at 140°C as the cathode catalyst, the specific discharge capacity of the LOB can achieve 5579 mAh/g with a 0.2 mA/cm 2 current density and maintain 140 stable cycles, limiting the specific discharge capacity to 500 mAh/g.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Shiyu Ma,Qingchao Liu,Dongling Lei,Xiaoqing Guo,Shunfang Li,Zhongjun Li
Issues with the sluggish kinetics of oxygen reduction and oxygen evolution reduction hinder the advance of Li O 2 batteries for next-generation energy storage. To alleviate these problems, Cu 2 O nanoparticles with different crystal planes have been synthesized via a simple solution reaction and characterized as a bi-functional catalyst for non-aqueous Li O 2 battery. In this work, catalytic behaviour of Cu 2 O nanoparticles with different crystal planes are initially explored and it is found that the Cu 2 O nanoparticles exposing {111} crystal planes exhibit the most catalytic performance compared with other crystal planes, which is further confirmed by using first-principles computations. Inspired by selectively catalytic behaviour of crystal plane, porous Cu 2 O nanoframes exposed with eight {111} crystal planes and higher surface area derives from all-corner-truncated rhombic dodecahedron Cu 2 O nanoparticles are synthesized, which can act as highly activity three-dimensional cathode in a typical Li O 2 battery after being directly combined with carbon nanotubes by electrostatic interaction . Thanks to the excellent catalytic activity of carbon nanotubes-Cu 2 O nanoframes and unique cathode structure, batteries with this cathode display an enhanced electrochemical performance including superior round-trip efficiency, excellent cycling performance and high specific capacity.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
FARADAY DISCUSSIONS
·
2023
·
IF 3.4
Chuan Tan,Wentao Wang,Yuping Wu,Yuhui Chen
Lithium–oxygen batteries are promising but have many challenges. Unlike lithium-ion batteries, they are usually discharge–charge cycled with capacity cutoff instead of potential cutoff, which brings controversy. Additionally, which superoxide intermediate, the dissolved or the adsorbed superoxide, is more reactive and leads to cell premature death and unsatisfactory discharge capacity? These questions puzzle researchers and impede the development of lithium–oxygen batteries. Herein, on one hand, we tried to decouple the influence of discharging potential and discharging current density on the discharge products and side reactions. We found that the electrode potential has more impact on the side reactions than the current density. The low potential leads to a high ratio of Li2CO3 to Li2O2 in the discharge product and hence more surface passivation. On the other hand, to identify the more reactive and aggressive species that cause surface passivation, a flow cell setup was applied to suppress the solution route and maximize the products from the surface route. Results show that more Li2CO3 was identified under a large flow rate and thus the intermediates in surface route appear to be more reactive than that in solution route.
研究领域:
电化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano-Micro Letters
·
2026
·Vol. 18
·期 1
·257
·
IF 38.5
Zhou Yin,Yin Kun,Zhang Tian,Feng Dongyu,Li Jiapei,Zhu Anquan,Lin Dewu,Xue Pan,Liu Yu,Liu Yongyu,Liu Kai,Liu Kunlun,Luan Chuhao,Yang Huawei,Chen Hou,Yao Yagang,Hong Guo
PtFe catalyst was rationally designed based on frontier molecular orbital theory to investigate orbital-level interactions for enhanced oxygen evolution reaction activity in Li–O 2 batteries.
The d z 2 – d z 2 orbital coupling between Fe and Pt leads to electron donation from Fe to Pt, increasing electron population in the Pt d z 2 orbital.
Excess electrons from the Pt d z 2 orbital occupy antibonding states with LiO 2 , weakening interaction strength and boosting oxygen evolution reaction kinetics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SOLID STATE IONICS
·
2021
·
IF 3.785
Songzhao Wang,Jiwen Hu,Xuefeng Gui,Shudong Lin,Yuanyuan Tu
Ni 12 P 5 has excellent electrochemical properties due to the existence of a large number of Ni P bonds with abundant phosphorus vacancies. RuO 2 has good electrical conductivity and catalytic activity , and its OER activity is very significant. In this paper, RuO 2 nanoparticles were loaded onto the surfaces of Ni 12 P 5 particles, forming RuO 2 /Ni 12 P 5 /C composite electrode catalytic materials which were prepared and applied to Li O 2 cells. The electrochemical tests reveal that the specific capacity of the Li O 2 battery with a RuO 2 /Ni 12 P 5 /C electrode reaches 4296 mAh g −1 , the cycle life reaches 56 cycles, and the over-potential is effectively controlled at the current density of 200 mA g −1 . This improvement is attributable to the effective adsorption of phosphorus vacancies in Ni 12 P 5 and the excellent OER catalytic activity of RuO 2 . Therefore, this work significantly enhanced the electrochemical performance of the cell, thus laying the foundation for the development of Li O 2 batteries.
研究领域:
电化学
·
材料科学
·
能源存储
·
催化化学
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Daming Yang,Ji Qi,Guiru Sun,Tong Wu,Rui Gao,Ze Gao,Hang Xu,Wei Lu,Ming Feng
Lithium‑oxygen battery (LOB) has attracted great interest due to its ultra-high theoretical specific capacity. However, the practical application of the LOB is obstructed by the high kinetic barriers and large overpotentials. Hence, a novel magnetic field assisted LOB (MF-LOB) is developed with ferromagnetic FeCo 2 O 4 nanowires as catalyst that can improve the ORR and OER kinetics through the application of a moderate magnetic field. The FeCo 2 O 4 nanowires are magnetized into nanomagnets with high spin polarization under a magnetic field, which is beneficial to the adsorption of O 2 -intermediates and transfer of electrons. Equally, the MHD effect contributes to the mass transport and diffusion including O 2 and Li + . The generation and oxidation of Li 2 O 2 are promoted for the MF-LOB based on FeCo 2 O 4 nanowires due to the high spin polarization and MHD effect. The MF-LOB based on FeCo 2 O 4 nanowires shows a lower overpotential of 0.89 V and longer cycle life of 150 cycles than those (1.22 V and 53 cycles) of the LOB without the magnetic field. This unique in-situ magnetic enhancement strategy for optimizing catalyst performance provides a new idea for the development of high-performance external field assisted LOBs.
研究领域:
电化学
·
材料科学
·
储能技术
·
纳米技术
·
应用物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Zhiqun Wang,Shaokang Tian,Bowen Shao,Shangda Li,Lei Li,Jun Yang
Cerium triflate (Ce(CF 3 SO 3 ) 3 ) is used as a superoxide radical scavenger in the ether-based liquid electrolyte for the Li O 2 batteries . The radical scavenging capability of Ce 3+ is evaluated both in potassium superoxide + crown solution and the Li O 2 batteries . The chemical analyses further demonstrate cerium ions can effectively slow down the decomposition of electrolyte attacked by superoxide radicals. When the capacity is fixed to 1000 mAh g −1 at a current density of 500 mA g −1 , the Li O 2 battery with 1M LiTFSI-TEGDME electrolyte begins to drop its discharge voltage rapidly to 2.0 V near 40th cycle while the electrolyte with Ce 3+ additives is still above 2.0 V after 88 cycles, demonstrating the cycle life of the Li O 2 batteries show remarkably improved compared to the Li O 2 batteries without any additive into electrolyte.
研究领域:
电化学
·
能源材料
·
电池化学
·
应用化学
·
无机化学
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2026
·
IF 10.7
Baoxin Ni,Guiru Sun,Xinru Wang,Daming Yang,Dongxu Yin,Ying Li,Mei Liu,Ming Feng
Suppressing the rapid recombination of photogenerated carriers is crucial for enhancing the cycling stability of photo-assisted Li O 2 cells. Herein, a magnetic-electric field coupling-aided mechanism is presented to further retard the recombination of photogenerated electrons and holes. This mechanism involves the construction of a ZnO-NiO p-n heterojunction as a semiconductor catalyst, where the intrinsic electric field drives the directional migration of photoinduced electron-hole pairs toward the surfaces of ZnO and NiO, respectively, thereby achieving spatial separation of the carriers. Furthermore, an external magnetic field is applied to exert opposite Lorentz forces on the migrating electrons and holes, effectively suppressing their recombination. Electrons and holes can respectively effectively facilitate the creation and decomposition of Li 2 O 2 , enhancing the reaction kinetic performance of ORR and OER. The photo-assisted LOBs based on ZnO-NiO is enabled to exhibit an overpotential of 0.29 V under a magnetic field, with its cycle life increased by 147.67% compared with that of the battery without a magnetic field. This magneto-electric field coupling strategy offers valuable insights for the fields of photocatalysis and photo-assisted metal-air batteries.
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Hong-bo Huang,Shao-hua Luo,Cai-ling Liu,Qing Wang,Yu-chun Zhai,Ting-feng Yi
Free-standing Co 3 O 4 on nickel foam is synthesized by a simple hydrothermal route, using cobalt nitrate hexahydrate as the cobalt source, and urea as the precipitator. The effects of urea on the structural and electrochemical characteristics are investigated in detail. As the urea increased, the morphology of the free-standing Co 3 O 4 turns from hexagonal nanosheets to nanoflakes, and finally turns to nanoflakes/nanowires hybrid structure. This hybrid structure is made up of ultrathin porous nanoflakes, and short nanowires anchored at the edge of the nanoflakes, which may enhance the diffusion rate of the electrolyte and O 2 and provide more active sites for both O 2 reduction and evolution reactions. When applied as a free-standing cathode for the Li O 2 cells, it shows better performance for the nanoflakes/nanowires hybrid structure than the others. It exhibits a high specific capacity of 5958 mA h g −1 at 0.1 mA cm −2 , a long cycle life of 108 cycles with a limited capacity of 500 mA h g −1 , and unique morphology of the discharge products.
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2019
·
IF 2.886
Tingshuai Yang,Chaozhu Shu,Zhiqian Hou,Ruixin Zheng,Peng Hei,Minglu Li,Zhiqun Ran,Qiang Zhang,Jianping Long
Solid-state lithium battery is considered as the next generation energy storage device with high security and outstanding energy density . However the low ionic conductivity of the electrolyte seriously limits its practical application. Here, we reported a high-performance flexible gel electrolyte based on graphene oxide (GO) doped poly (vinylidene fluoride-hexafluoro pentaene) cross-linked with poly (ethylene oxide) (PHPG) through weak bond interaction. The polymer electrolyte shows a 3D porous structure with an ionic conductivity of 3.4 × 10 − 4 S cm − 1 at room temperature . Moreover, Li ion transference number is about 0.58, which could greatly accelerate the fast transmission of cations and anions . As a result, the PHPG-based Li symmetrical battery (Li/PHPG/Li) can run stably >750 h at 0.5 mA cm − 2 , showing good stability and security due to the remarkable suppression of Li dendrite growth. Li O 2 batteries assembled with PHPG membrane as electrolyte can operate over 300 cycles at high current density (1 mA cm − 2 ), indicating excellent cycling performance. The excellent performance of PHPG makes PHPG a very promising electrolyte for next-generation solid-state Li O 2 batteries.
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
Advanced Energy Materials
·
2020
·Vol. 10
·期 38
·2001592
·
IF 25.245
Xiaodong Lin,Zongqiang Sun,Chun Tang,Yuhao Hong,Pan Xu,Xueyang Cui,Ruming Yuan,Zhiyou Zhou,Mingsen Zheng,Quanfeng Dong
The reduction of O 2 to solid Li 2 O 2 on discharge and the reverse oxidation of Li 2 O 2 to O 2 on recharge are the essential processes to determine the performance of Li-O 2 batteries. The discovery of effective catalysts with a favorable Li 2 O 2 formation/decomposition mechanism is vital for the development of high-performance Li-O 2 batteries. Here, a soluble catalyst of iodosylbenzene (PhIO) that can offer a highly reversible O 2 conversion is reported for the first time. Benefiting from its ability to capture and couple the LiO 2 intermediate, which is endowed by its polarized I 3+ O 2− bond where the I atom and O atom can serve as a Lewis acidic site and basic site (dual site) to interact with O 2 − and Li + , respectively, the formation and decomposition of Li 2 O 2 by a one-electron pathway can be effectively promoted, thus greatly improving the electrode surface passivation issue and the reaction kinetics. In addition, the side reactions caused by the traditional high-reactive LiO 2 intermediate can also be effectively suppressed by forming a series of low-reactive intermediates (LiO 2 3PhIO, (LiO 2 ) 2 4PhIO, and Li 2 O 2 4PhIO) instead. Consequently, the PhIO-catalyzed Li–O 2 batteries exhibit a low overpotential, a large capacity, and a good cyclability.
研究领域:
材料科学
·
电化学
✓ 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）