ZTE Corporation, a leading global provider of telecommunications equipment and networking, has announced at the GSMA World Mobile Congress Barcelona 2010 that its global GSM sales continued to grow fast in 2009, with ...ZTE Corporation, a leading global provider of telecommunications equipment and networking, has announced at the GSMA World Mobile Congress Barcelona 2010 that its global GSM sales continued to grow fast in 2009, with a shipment of over 750,000 carrier frequencies in the past year. As its share in the global newly added market rose to almost 20%, ZTE is now one of the top 3 equipment vendors in the industry. In 2009, ZTE successfully sold its GSM products to world-class multinational operators such as Telenor, Teliasonera and Cell C, making large-scale advancements in European and emerging markets.展开更多
ZTE Corporation announced on November 12, 2009 that ZTE’s xPON Next Generation Optical Access Platform has recently passed authoritative tests by the Metro Ethernet Forum (MEF) organization, making
ZTE Corporation announced on February 9 that it had received the Best Practice Award for being Frost ＆ Sullivan＇s ＂2010 SDR Equipment Vendor of the Year.＂ This award recognizes ZTE＇s outstanding contribution to t...ZTE Corporation announced on February 9 that it had received the Best Practice Award for being Frost ＆ Sullivan＇s ＂2010 SDR Equipment Vendor of the Year.＂ This award recognizes ZTE＇s outstanding contribution to the development of Software Defined Radio （SDR） technology and the wireless communications industry.展开更多
Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-Se) batteries. Herein, a series of three ...Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-Se) batteries. Herein, a series of three dimensional ordered hierarchically porous carbon(3D OHPC) materials with micro/meso/macropores are designed and synthesized for Li-Se battery. The porous structure is tuned by following the concept of the generalized Murray’s law to facilitate the mass diffusion and reduce ion transport resistance.The optimized 3D Se/OHPC cathode exhibits a very high 2 nd discharge capacity of 651 m Ah/g and retains 361 m Ah/g after 200 cycles at 0.2 C. Even at a high current rate of 5 C, the battery still shows a discharge capacity as high as 155 m Ah/g. The improved electrochemical performance is attributed to the synergy effect of the interconnected and well-designed micro, meso and macroporosity while shortened ions diffusion pathways of such Murray materials accelerate its ionic and electronic conductivities leading to the enhanced electrochemical reaction. The diffusivity coefficient in Se/OHPC can reach a very high value of 1.3 × 10^(-11)cm^(2)/s, much higher than those in single pore size carbon hosts. Their effective volume expansion accommodation capability and reduced dissolution of polyselenides ensure the high stability of the battery. This work, for the first time, established the clear relationship between textural properties of cathode materials and their performance and demonstrates that the concept of the generalized Murray’s law can be used as efficient guidance for the rational design and synthesis of advanced hierarchically porous materials and the great potential of 3D OHPC materials as a practical high performance cathode material for Li-Se batteries.展开更多
文摘ZTE Corporation, a leading global provider of telecommunications equipment and networking, has announced at the GSMA World Mobile Congress Barcelona 2010 that its global GSM sales continued to grow fast in 2009, with a shipment of over 750,000 carrier frequencies in the past year. As its share in the global newly added market rose to almost 20%, ZTE is now one of the top 3 equipment vendors in the industry. In 2009, ZTE successfully sold its GSM products to world-class multinational operators such as Telenor, Teliasonera and Cell C, making large-scale advancements in European and emerging markets.
文摘ZTE Corporation announced on November 12, 2009 that ZTE’s xPON Next Generation Optical Access Platform has recently passed authoritative tests by the Metro Ethernet Forum (MEF) organization, making
文摘ZTE Corporation announced on February 9 that it had received the Best Practice Award for being Frost ＆ Sullivan＇s ＂2010 SDR Equipment Vendor of the Year.＂ This award recognizes ZTE＇s outstanding contribution to the development of Software Defined Radio （SDR） technology and the wireless communications industry.
基金financial support from the China Scholarship Council (CSC) and a scholarship from the Laboratory of Inorganic Materials Chemistry,Universitéde Namur,Belgiumfinancially supported by the National Postdoctoral Program (Grant No. 2020M672782)+2 种基金the National Natural Science Foundation of China (Grant No. U1663225)the the Program of Introducing Talents of Discipline to Universities-National 111 Project from the Ministry of Science and Technology and the Ministry of Education of China (Grant No. B20002)the National Key R&D Program of China (Grant No. 2016YFA0202602)。
文摘Developing host materials with high specific surface area, good electron conductivity, and fast ion transportation channel is critical for high performance lithium-selenium(Li-Se) batteries. Herein, a series of three dimensional ordered hierarchically porous carbon(3D OHPC) materials with micro/meso/macropores are designed and synthesized for Li-Se battery. The porous structure is tuned by following the concept of the generalized Murray’s law to facilitate the mass diffusion and reduce ion transport resistance.The optimized 3D Se/OHPC cathode exhibits a very high 2 nd discharge capacity of 651 m Ah/g and retains 361 m Ah/g after 200 cycles at 0.2 C. Even at a high current rate of 5 C, the battery still shows a discharge capacity as high as 155 m Ah/g. The improved electrochemical performance is attributed to the synergy effect of the interconnected and well-designed micro, meso and macroporosity while shortened ions diffusion pathways of such Murray materials accelerate its ionic and electronic conductivities leading to the enhanced electrochemical reaction. The diffusivity coefficient in Se/OHPC can reach a very high value of 1.3 × 10^(-11)cm^(2)/s, much higher than those in single pore size carbon hosts. Their effective volume expansion accommodation capability and reduced dissolution of polyselenides ensure the high stability of the battery. This work, for the first time, established the clear relationship between textural properties of cathode materials and their performance and demonstrates that the concept of the generalized Murray’s law can be used as efficient guidance for the rational design and synthesis of advanced hierarchically porous materials and the great potential of 3D OHPC materials as a practical high performance cathode material for Li-Se batteries.
