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| 1 | Carbon-coated mesoporous Co9S8 nanoparticles on reduced graphene oxide as a long-life and high-rate anode material for potassium-ion batteries显示文摘Carbon-coated mesoporous Co9S8 nanoparticles supported on reduced graphene oxide(rGO)are successfully synthesized by a simple process.This composite makes full use of the protection of the carbon layer on the surface,the good conductivity and three-dimensional(3D)structure of rGO,the mesoporous structure and nanoscale size of Co9S8,thereby presenting the excellent electrochemical performances in potassium-ion batteries,407.9 mAh·g^−1 after 100 cycles at 0.2 A·g^−1 and 215.1 mAh·g^−1 at 5 A·g^−1 in rate performances.After 1,200 cycles at 1.0 A·g^−1,this composite still remains a capacity of 210.8 mAh·g^−1.The redox reactions for potassium storage are revealed by ex-situ transmission electron microscope(TEM)/high-resolution TEM(HRTEM)images,selected area electron diffraction(SAED)patterns and X-ray photoelectron spectroscopy(XPS)spectra.The application of this composite as the host of sulfur for Li-S batteries is also explored.It sustains a capacity of 431.8 mAh·g^−1 after 800 cycles at 3 C,leading to a degradation of 0.052%per cycle.These results confirm the wide applications of this composite for electrochemical energy storage. | Guangyao Ma Xiao Xu Zhenyu Feng Chenjing Hu Yansong Zhu Xianfeng Yang Jian Yang Yitai Qian | 2020 | Nano Research2020，13，3： | 9 |
| 2 | Leakage research on supercritical carbon dioxide fluid in rolling piston expander显示文摘The leakage research on supercritical carbon dioxide fluid in rolling piston expander was investigated experimentally.Using expander instead of throttle valve is an important way to improve the efficiency of carbon dioxide refrigeration system.However,the supercritical fluid leakage in expander is serious and is the main factor affecting the expander's efficiency.This paper presented and compared four classic leakage models.The analysis indicated that laminar leakage model is suitable in leakage simulation of expander.A leakage test system,including the leakage test part which has two types of leakage specimens with different gaps ranging from 5 to 15 m,was established.The experimental results indicated that lubricant film played an important role.When the leakage clearance of cylindrical specimen was 5 m,the mass flow rate of leakage was about 0.88 g s-1.The data was 3.638 g s-1 with leakage clearance being 10 m and 7.11g s-1 with leakage clearance being 15 m.A modified leakage model was developed,whose average deviation was within 10% compared with the experimental data.At last,this paper simulated the leakage in rolling piston expander presented by Tian et al.(2010).The leakage between rolling piston and cylinder was the most serious part with the value up to 0.04 kg s-1. | TIAN Hua MA YiTai LI MinXia LIU ShengChun WANG KaiYang | 2012 | Science China(Technological Sciences)2012，55，6： | 3 |
| 3 | Research and application of CO_2 refrigeration and heat pump cycle显示文摘The environmental problem caused by refrigerant has become the focus all over the world.As the most typical natural refrigerant,CO2,of course,becomes the research focus.This paper introduces the development and application status of CO2 refrigeration and heat pump technology.The researches on CO2 refrigeration and heat pump,carried out by Thermal Energy Research Institute,Tianjin University,also are presented in this paper. | TIAN Hua,YANG Zhao,LI MinXia & MA YiTai Thermal Energy Research Institute,Tianjin University,Tianjin 300072,China | 2009 | Science China(Technological Sciences)2009，52，6： | 3 |
| 4 | Exergy analysis of transcrit- ical carbon dioxide refrigeration cycle with an expander 显示文摘 | Yang Junlan Ma Yitai Li Minxia | 2005 | Energy2005，30，： | 1 |
| 5 | The status and future of energy efficiency standard of water chillers in China显示文摘 | Tian Hua Ma Yitai Li Minxia | 2010 | Energy Police2010，38，11： | 1 |
| 6 | Exergy analysis of transcritical carbon dioxide refrigeration cycle with an expander显示文摘 | Yang Junlan Ma Yitai Li Minxia | 2005 | Energy2005，，30： | 1 |
| 7 | Some design features of CO2 swing piston expander 显示文摘 | Guan Haiqing Ma Yitai Li Minxia | 2006 | Applied Thermal Engineering2006，26，2： | 1 |
| 8 | Some design features of CO2 swing piston expander 显示文摘 | Guan Haiqing Ma Yitai Li Minxia | 2006 | Applied Thermal Engineering2006，26，23： | 1 |
| 9 | Theoretical analysis and experimental research on tianscritical C02two stage compression cycle withtwo gas coolers (TSCC +TG) and the cycle with intercooler (TSCC +IC) 显示文摘 | Hongli Wang Yitai Ma’Jingmi Tian Minxia Li | 2011 | Energy Conversion and Management2011，52，89： | 1 |
| 10 | Utilization of straw in biomass energy in China 显示文摘 | ZENG Xianyang MA Yitai MA Lirong | 2007 | Renewable and Sustainable Energy Reviews2007，11，5： | 1 |
| 11 | Exergy analysis of transcritical carbon dioxide refrigerationcycle with an expander显示文摘 | Yang Junlan Ma Yitai Li Minxia | 2005 | Energy2005，30，7： | 1 |
| 12 | Image of energy consumption of well off society in China 显示文摘 | Wei Lu and Yitai Ma | 2004 | Energy Conversation & Management2004，45，： | 1 |
| 13 | Exergy analysis of trans-critical carbon dioxide refrigeration cycle with an expander显示文摘 | Yang Junlan Ma Yitai Li Minxia | 2005 | Energy2005，30，7： | 1 |
| 14 | Some design features of CO2 swing piston expander 显示文摘 | GUAN Haiqing MA Yitai LI Minxia | 2006 | Applied Thermal Engineering2006，26，23： | 1 |
| 15 | Utilization of straw in biomass energy in China显示文摘 | Zeng Xianyang Ma Yitai Ma Lirong | 2007 | Renewable & Sustainable Energy Review2007，11，5： | 1 |
| 16 | Utilization of straw in biomass energy in China 显示文摘 | ZENG Xianyang MA Yitai MA Lirong | 2007 | Renewable and Sustainable Energy Reviews2007，，11： | 1 |
| 17 | Image of energy consumption of well off society in China 显示文摘 | Wei Lu Yitai Ma | 2004 | Energy Conversion and Management2004，45，： | 1 |
| 18 | Utilization of straw in biomass energy in China显示文摘 | Zeng Xianyang Ma Yitai Ma Lirong | 2007 | Renewable and Sustainable Energy Reviews2007，，11： | 1 |
| 19 | Image of energy consumption of well off society in China显示文摘 | WEI YU YITAI MA | 2004 | Energy Conversation & Management2004，45，： | 1 |
| 20 | Influence of a non- condensable gas on the performance of a piston expander for use in carbon dioxide trans-critical heat pumps显示文摘 | Tian Hua Ma Yitai Li Minxia | 2011 | Applied Thermal Engineering2011，31，11： | 1 |
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