RSC Advances
·
2018
·Vol. 8
·期 41
·23397-23403
·
IF 2.936
Zhuo-Liang Jiang,Jing Xie,Cong-Shan Luo,Meng-Yang Gao,Huan-Liang Guo,Mo-Han Wei,Hong-Jun Zhou,Hui Sun
The mechanism of Li–O2 batteries is based on the reactions of lithium ions and oxygen, which hold a theoretical higher energy density of approximately 3500 W h kg−1. In order to improve the practical specific capacity and cycling performance of Li–O2 batteries, a catalytically active mechanically robust air cathode is required. In this work, we synthesized a freestanding catalytic cathode with RuO2 decorated 3D web Co3O4 nanowires on nickel foam. When the specific capacity was limited at 500 mA h g−1, the RuO2–Co3O4/NiF had a stable cycling life of up to 122 times. The outstanding performance can be primarily attributed to the robust freestanding Co3O4 nanowires with RuO2 loading. The unique 3D web nanowire structure provides a large surface for Li2O2 growth and RuO2 nanoparticle loading, and the RuO2 nanoparticles help to promote the round trip deposition and decomposition of Li2O2, therefore enhancing the cycling behavior. This result indicates the superiority of RuO2–Co3O4/NiF as a freestanding highly efficient catalytic cathode for Li–O2 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
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Daming Yang,Yingyue Zhang,Jiaqi Sun,Xinyu Zhang,Ze Gao,Qilong Sun,Tong Wu,Wei Lu,Guiru Sun,Ming Feng
The photo-assisted strategy is viewed as a promising method to improve the ORR and OER performance of Li–O 2 batteries. Nevertheless, designing a photocatalyst that ensures wide light absorption and minimizes the recombination of photoinduced electrons and holes is still a notable challenge. In this study, 2D porous Co 3 O 4 nanosheets are synthesized as photocatalysts for photo-assisted Li–O 2 batteries. Their unique structure improves surface area, facilitates O 2 transport, and stores discharge products. Equally, the Co 3 O 4 nanosheets exhibit strong light responsiveness and photocatalytic activity. Upon optical field, photoinduced electrons and holes are successfully separated on Co 3 O 4 nanosheets, which promotes the formation and decomposition of Li 2 O 2 , respectively. Li–O 2 cells using Co 3 O 4 nanosheets display a low overpotential of 0.15 V and good cycling stability under optical field. These findings highlight the potential of Co 3 O 4 nanosheets as photocatalysts for photo-assisted Li–O 2 batteries, providing a foundation for future energy storage advancements.
研究领域:
材料科学
·
能源化学
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·
IF 13.3
Yuxin Long,Qiang Li,Zidong Zhang,Qingxi Zeng,Dong Liu,Lanling Zhao,Yao Liu,Yebing Li,Yiming Zhang,Kunqian Ji,Zhaorui Zhou,Xue Han,Jun Wang
Li-O 2 batteries could deliver ultra-high theoretical energy density compared to current Li-ion batteries counterpart. The slow cathode reaction kinetics in Li-O 2 batteries, however, limits their electrocatalytic performance. To this end, MoSe 2 and Ni 0.85 Se nanoflakes were decorated in carbon hollow nanoflowers, which were served as the cathode catalysts for Li-O 2 batteries. The hexagonal Ni 0.85 Se and MoSe 2 show good structural compatibility with the same space group, resulting in a stable heterogeneous structure. The synergistic interaction of the unsaturated atoms and the built-in electric fields on the heterogeneous structure exposes abundant catalytically active sites, accelerating ion and charge transport and imparting superior electrochemical activity, including high specific capacities and stable cycling performance. More importantly, the lattice distances of the Ni 0.85 Se (101) plane and MoSe 2 (100) plane at the heterogeneous interfaces are highly matched to that of Li 2 O 2 (100) plane, facilitating epitaxial growth of Li 2 O 2 , as well as the formation and decomposition of discharge products during the cycles. This strategy of employing nonstoichiometric compounds to build heterojunctions and improve Li-O 2 battery performance is expected to be applied to other energy storage or conversion systems.
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
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
·
2022
·Vol. 46
·期 14
·19357-19367
·
IF 4.672
Jiuqing Liu,Feifei Song,Junying He,Zikun Hong,Qihou Li,Ya Chen,Lishun Bai,Fanli Zeng,Chen Cheng,Zehao Chen
Summary Owing to its unparalleled theoretical energy density, the Li-O 2 batteries are thought to be one of the most promising energy storage systems, but its application is seriously hindered by its potential safety risks arising from the passivation and corrosion of lithium anode. To address these issues, it is an efficient way to develop functionalized separator that could prevent the migration of anions and macromolecules from cathode toward anode. Herein, a novel Nafion-functionalized polyethersulfone (PES)-based ion-permselective separator was prepared by using non-solvent induced phase separation (NIPS) method. The Nafion ensures a better physical strength of the composite separator, and further characterizations show that the obtained composite separator owns good ionic conductivity (0.52 mS cm −1 ), high lithium ion migration number (0.80), and better cyclic stability (120 cycles, 1000 mAh g −1 ). Consequently, the composite separator serves as an excellent candidate to solve the “shuttle effect” of redox mediators (RMs), the assembled Li-O 2 battery with composite separator adding LiI as RMs presents lower charge overpotential and longer cycle stability (170 cycles, 1000 mAh g −1 ).
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Jingning Lai,Nan Chen,Fengling Zhang,Bohua Li,Yanxin Shang,Liyuan Zhao,Li Li,Feng Wu,Renjie Chen
High energy density lithium-oxygen (Li-O 2 ) batteries require soluble catalysts to accelerate the kinetics of oxygen reduction/evolution reaction (ORR/OER), and require SEI forming additives to protect lithium metal anode from side reaction with solvents, reduced oxygen species and soluble catalysts. In this study, a tri-functional additives 1-methyl, 3-benzyl, 1H imidazolium bromide (IMPBr) is dissolved in the dimethyl sulfoxide (DMSO)-based electrolyte to solve the problems of the slow dynamic process of ORR and OER, and protect the lithium anode by suppressing the dendrite formation in O 2 atmosphere. During discharging, IMP + has a strong binding ability to the intermediate product O 2 − , and Br − is highly associated with Li + , helping drive the solvation mechanism. During charging, Br − mediates the decomposition of battery discharge products and reduces the charge overpotential. Meanwhile, the positively charged IMP + can be attracted to the surface of the anode via electric attraction, in situ forming a stable SEI layer to prevent DMSO, Br 3 – , and Br 2 from attacking the lithium metal and growth of lithium dendrites. The synergy effect of the IMP + and Br – improves the cycle and rate performance of the Li-O 2 battery.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 8
·期 1
·259-267
·
IF 10.733
Congcong Dang,Yu Wang,Biao He,Weibin Zhang,Feng Dang,Hongchao Wang,Yong Du
Searching for highly efficient and low cost electrocatalysts is an urgent challenge to provide high capacity and long cycle life Li–O2 batteries (LOBs). In this work, the highly efficient electrocatalytic properties of MoSi2 were first demonstrated using particles prepared by a solid–state reaction method. The surface was activated, playing a dominant role in the electrocatalytic performance. After acid etching to remove SiO2 impurities arising from the surface oxidation, MoSi2 exhibited excellent bifunctional electrocatalytic properties for LOBs. Mo6+ on the surface contributed to the initial low overpotentials of 0.45 V (3.2 V for the OER and 2.75 V for the ORR) and transformed into Mo4+ for a long cycle life. As a consequence, outstanding rate capabilities of 12 708 mA h g−1 at 100 mA g−1 and 10 794 mA h g−1 at 800 mA g−1, and excellent cycle durability of 215 and 90 cycles at a limited capacity of 1000 mA h g−1 at 200 and 500 mA g−1, respectively, were obtained for the MoSi2 cathode.
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
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xiaohui Peng,Mingzhe Li,Lihua Huang,Qizhe Chen,Weiwei Fang,Yuyang Hou,Yusong Zhu,Jilei Ye,Lili Liu,Yuping Wu
Developing ideal Li–O2 batteries (LOBs) requires the discharge product to have a large quantity, have large contact area with the cathode, and not passivate the porous surface after discharge, which put forward high requirement for the design of cathodes. Herein, combining the rational structural design and high activity catalyst selection, minor amounts of RuO2-incorporated Co3O4 nanoneedles grown on carbon cloth are successfully synthesized as binder-free integrated cathodes for LOBs. With this unique design, plenty of electron–ion–oxygen tri-phase reaction interface is created, the side reaction from carbon is isolated, and oxygen reduction reaction/oxygen evolution reaction (OER) kinetics are significantly facilitated. Upon discharge, film-like Li2O2 is observed growing on the needle surface first and eventually ball-like Li2O2 particles form at each tip of the needle. The cathode surface remains porous after discharge, which is beneficial to the OER and is rare in the previous reports. The battery exhibits a high specific discharge capacity (7.64 mAh cm–2) and a long lifespan (500 h at 0.1 mA cm–2). Even with a high current of 0.3 mA cm–2, the battery achieves a cycling life of 200 h. In addition, punch-type LOBs are fabricated and successfully operated, suggesting that the cathode material can be utilized in ultralight, flexible electronic devices.
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
·
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
COMPOSITES PART B-ENGINEERING
·
2021
·
IF 9.078
Yang Zhan,Shao-hua Luo,Jian Feng,Lin Zhang,Xin Liu,Qing Wang,Ya-hui Zhang
The lithium-oxygen batteries (LOBs) have gained extensive interest in the past decade, but are plagued by slow reaction kinetics and induced large-voltage hysteresis. Therefore, developing extremely capable catalysts to enhance catalytic behavior and mitigate oxidation-reduction overpotential of LOBs is of huge challenge and significance. Attributable to their economically friendly and great activity, transition metal oxides (TMO) have incurred lots of attention as alternative electrocatalysts to replace the currently used noble metal-based catalysts. In this work, we fabricate a highly efficient TMO (the MIL-88A heated at 500 °C under protective flow, M8-Fe 3 O 4 @NC-500) electrocatalyst as advanced cathodes, which attributed to its unique structure, numerous dendritic-shaped carbon layer was anchored inplane into the micrometer-long spindle-shaped prisms with evenly distribution and contains abundant Fe–N/Graphitic N active sites. Therefore, the LOBs (based on M8-Fe 3 O 4 @NC-500/AB cathode) deliver superior electrochemical performance with large specific capacities of 14866.1 mAh g −1 , low overpotentials (1.31 V), and steady cycling stability (553 cycles, limited 500 mAh g −1 , under 0.05 mA cm −2 ). Our work provides a novel vision to rationally design and synthesize a powerful TMO electrocatalyst (with the 2D carbon nanosheet coating) for the LOBs cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2014
·
IF 4.835
Wugang Fan,Xiangxin Guo,Dongdong Xiao,Lin Gu
Gold nanoparticles (AuNPs) anchored to vertically aligned carbon nanotubes (VACNTs) act as additional nucleation sites for the Li2O2 growth, leading to the decreased size while increased density of Li2O2 particles in process of discharge. Correspondingly, at the deep discharge to 2.0 V the batteries show increased specific capacity. Upon charge, the AuNPs exhibit promotion effect on the Li2O2 decomposition by improving the conduction property of the discharge-formed particles, rather than by imposing the conventional electrocatalytic effect on the oxygen evolution reaction. Moreover, the AuNPs show promotion effect on decomposition of carbonate species arising from the side reactions. These effects consequently lead to the reduced charge overpotentials and extended cycle operation of the batteries. The results here provide a new as well as clear picture on the role of incorporated AuNPs in the Li2O2 formation and decomposition, which would be helpful for better understanding and constructing of high-performance air cathodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Hongyu Dong,Yiwen Wang,Panpan Tang,Hao Wang,Ke Li,Yanhong Yin,Shuting Yang
Although the theoretical energy density of lithium-oxygen batteries is extremely high, pulverization of lithium metal anode obviously influences batteries cycling performance. In this work, the cathode was coated with a membrane to protect the lithium anode from moisture attacking and avoid the pulverization. The membrane is composed of polyethylene oxide and poly tetra fluoroethylene, which improves the cycle life of the lithium-oxygen batteries cycles to 230 times, with a limited specific capacity of 1000 mAh·g −1 , at a current density of 100 mA·g −1 . Furthermore, the batteries perform stable charge and discharge cycles for 55 times in the air atmosphere, with the relative humidity greater than 50%. It demonstrates this strategy provides a new direction for the development of high-performance lithium-oxygen 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
Nano Research
·
2024
·Vol. 17
·期 7
·6119-6126
·
IF 9.5
Li Ziwei,Yu Yue,Yang Dongyue,Wang Jin,Yan Junmin,Huang Gang,Liu Tong,Zhang Xinbo
Li-O 2 batteries with high energy density hold significant promise as next-generation energy storage systems. However, Li-O 2 batteries have poor cycling performance at high current densities and large capacities, primarily due to the high impedance caused by the instability of the lithium anode and the sluggish kinetics in the discharge products decomposition on the cathode. Herein, we investigated a bifunctional nitrile additive (2-methoxy benzonitrile (2-MBN)) with good chemical/electrochemical stability to improve the performances of Li-O 2 batteries. The 2-MBN could actively modify the anode by ensuring uniform Li + deposition and optimizing the composition of solid electrolyte interphase (SEI). Meanwhile, it could also facilitate the decomposition of discharge products by inducing the formation of sheet-like Li 2 O 2 , significantly reducing the battery charge overpotential. The bifunctional effects of 2-MBN for the anode and cathode enable Li-O 2 batteries to achieve a stable lifetime of 97 cycles at a current density of 600 mA·g −1 with a fixed capacity of 2000 mAh·g −1 , much better than that of Li-O 2 batteries without 2-MBN (28 cycles). The inclusion of 2-MBN provides an effective approach for attaining high-performance Li-O 2 batteries.
研究领域:
电化学
·
能源材料科学
✓ 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）