High-voltage lithium-ion batteries(HVLIBs) are considered as promising devices of energy storage for electric vehicle, hybrid electric vehicle, and other high-power equipment. HVLIBs require their own platform voltage...High-voltage lithium-ion batteries(HVLIBs) are considered as promising devices of energy storage for electric vehicle, hybrid electric vehicle, and other high-power equipment. HVLIBs require their own platform voltages to be higher than 4.5 V on charge. Lithium nickel manganese spinel LiNi_(0.5)Mn_(1.5)O_4(LNMO) cathode is the most promising candidate among the 5 V cathode materials for HVLIBs due to its flat plateau at 4.7 V. However, the degradation of cyclic performance is very serious when LNMO cathode operates over 4.2 V. In this review, we summarize some methods for enhancing the cycling stability of LNMO cathodes in lithium-ion batteries, including doping, cathode surface coating,electrolyte modifying, and other methods. We also discuss the advantages and disadvantages of different methods.展开更多
Olivine lithium iron phosphate(Li Fe PO4) is considered as a promising cathode material for high power density lithium ion battery due to its high capacity, long cycle life, environmental friendly, low cost, and safet...Olivine lithium iron phosphate(Li Fe PO4) is considered as a promising cathode material for high power density lithium ion battery due to its high capacity, long cycle life, environmental friendly, low cost, and safety consideration. The theoretical capacity of Li Fe PO4 based on one electron reaction is 170 m Ah g-1at the stable voltage plateau of 3.5 V vs. Li/Li+. However, the instinct drawbacks of olivine structure induce a poor rate performance, resulting from the low lithium ion diffusion rate and low electronic conductivity.In this review, we summarize the methods for enhancing the rate performance of Li Fe PO4 cathode materials,including carbon coating, elements doping, preparation of nanosized materials, porous materials and composites,etc. Meanwhile, the advantages and disadvantages of above methods are also discussed.展开更多
The escalating global consumption of fossil fuels has significantly elevated the levels of CO_(2)in the atmosphere,leading to an undesirable global energy crisis and environmental degradation.Rapid deployment of renew...The escalating global consumption of fossil fuels has significantly elevated the levels of CO_(2)in the atmosphere,leading to an undesirable global energy crisis and environmental degradation.Rapid deployment of renewable energy resources is crucial to mitigate these challenges.In recent years,there has been noteworthy progress in electrochemical energy storage and conversion techniques and devices,including hydrogen energy and fuel cells,advanced energy storage and power batteries,and CO_(2)electrochemical conversion and utilization.展开更多
基金supported by the foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions and Science and Technology Foundation(ykj-2016-00161)partly supported by International Research Promotion Program(IRPR)of Osaka University
文摘High-voltage lithium-ion batteries(HVLIBs) are considered as promising devices of energy storage for electric vehicle, hybrid electric vehicle, and other high-power equipment. HVLIBs require their own platform voltages to be higher than 4.5 V on charge. Lithium nickel manganese spinel LiNi_(0.5)Mn_(1.5)O_4(LNMO) cathode is the most promising candidate among the 5 V cathode materials for HVLIBs due to its flat plateau at 4.7 V. However, the degradation of cyclic performance is very serious when LNMO cathode operates over 4.2 V. In this review, we summarize some methods for enhancing the cycling stability of LNMO cathodes in lithium-ion batteries, including doping, cathode surface coating,electrolyte modifying, and other methods. We also discuss the advantages and disadvantages of different methods.
基金supported by the Foundation on the Creative Research Team Construction Promotion Pro ject of Beijing Municipal Institutions
文摘Olivine lithium iron phosphate(Li Fe PO4) is considered as a promising cathode material for high power density lithium ion battery due to its high capacity, long cycle life, environmental friendly, low cost, and safety consideration. The theoretical capacity of Li Fe PO4 based on one electron reaction is 170 m Ah g-1at the stable voltage plateau of 3.5 V vs. Li/Li+. However, the instinct drawbacks of olivine structure induce a poor rate performance, resulting from the low lithium ion diffusion rate and low electronic conductivity.In this review, we summarize the methods for enhancing the rate performance of Li Fe PO4 cathode materials,including carbon coating, elements doping, preparation of nanosized materials, porous materials and composites,etc. Meanwhile, the advantages and disadvantages of above methods are also discussed.
文摘The escalating global consumption of fossil fuels has significantly elevated the levels of CO_(2)in the atmosphere,leading to an undesirable global energy crisis and environmental degradation.Rapid deployment of renewable energy resources is crucial to mitigate these challenges.In recent years,there has been noteworthy progress in electrochemical energy storage and conversion techniques and devices,including hydrogen energy and fuel cells,advanced energy storage and power batteries,and CO_(2)electrochemical conversion and utilization.
