| 1. | The influence of doping materials to the thermal conductivity of shape - stabilized phase change material
掺杂对定形相变材料导热系数的影响 |
| 2. | Though the two doped materials in the composition system are all soft - magnetic ferrite , but the results are very different
同是两种铁氧体材料的复合，但他们复合的方式是不同的。在lo石r们灿n厂e20 。 |
| 3. | Surface chemical analysis - secondary ion mass spectrometry - determination of boron atomic concentration in silicon using uniformly doped materials
表面化学分析.次级离子质谱法.利用均匀掺杂材料测定硅中硼原子浓度 |
| 4. | Surface chemical analysis - secondary - ion mass spectrometry - determination of boron atomic concentration in silicon using uniformly doped materials
表面化学分析.次级离子质光谱测定法.采用均匀涂料的硅中硼原子浓度测定 |
| 5. | Because this wavelength coincides with the minimum loss window of conventional silica - based optical fiber , many works are currently devoted to the study of er doped materials
由于此波长与常用的si基光纤的最小传输窗口对应，因而吸引了许多研究者从事er掺杂材料的研究。 |
| 6. | The doped material performed well electrochemical property for cycling . the initial discharge capacity of doped material was 165mah / g . after 80 cycles , the capacity loss was about 20 %
使用溶胶凝胶法对层状limno2进行2 % al3 +的掺杂改性,初始放电容量可达165mah / g , 80次循环后衰减约20 % 。 |
| 7. | Improved cycling performance and enhanced thermal stability are observed for ti - doped cathode materials . these positive effects are attributed to the changes of cationic distribution and chemical bonds in the structure of ti - doped materials
钦的掺杂能够在损失部分容量的情况下，改善和提高lini08coo . 20 :电极材料的充放电循环性能和热稳定性。 |
| 8. | A significant suppression of phase transitions and lattice changes during cycling is occurred for ti - doped materials , and a decrease of interface reaction activity between the cathode and electrolyte is also demonstrated for ti - doped cathodes . as a result , the capacity losses , which are originated from structural changes and interface reactions during cycling , decrease and thereby cycling life increases for ti - doped materials
掺钦后，电极材料的离子分布形式发生变化，引起材料结构中的化学键产生变化，电极材料充放电过程中的结构相变得到有效抑制，结构变化相应减小，电极材料在高电位下的界面反应活性也减弱，从而减小了由结构变化和界面反应引起的容量损失，改善了电极材料的充放电循环性能。 |
| 9. | The structural stability of delithiated cathode materials is also increased after co doping . therefore , co - doped materials show improved cycling performance and thermal stability . lini0 . 8co0 . 2o2 compound is thought the most promising candidate of cathode material for lithium ion batteries , although its thermal stability and cycling performance still need to further improve
综合考虑容量和成本因素， lini _ ( 0 . 8 ) co _ ( 0 . 2 ) o _ 2摘要lini08co02oz电极材料是最具有实用化前景的铿镍钻氧化物电极材料，但其热稳定性和充放电循环稳定性仍然需要进一步改善和提高。 |
| 10. | This thesis focuses on the study of the layered lithium nickel - based oxides as catho de materials lithium - ion batteries , the main aspects follow : 1 study on the synthesis and properties of linixco1 - xo2 by the sol - gel method compared with solid - state method , sol - gel method enjoys the advantage of lower calcining temperature and small uniform particle size of products . after the xrd measurement , it was shown that the single - phase layered compound can be prepared in sintering temperature of 750 for 6 ~ 8 hours . the sintering temperature , the properties and the amounts of doping materials can all affect the product ' s phase , and its structure ( lattice parameter , crystal phase distance )
本论文的研究工作主要集中在作为锂离子电池正极材料的层状锂镍基氧化物上，包括以下几个方面： 1溶胶凝胶法( sol - gel )合成lini _ xco _ ( 1 - x ) o _ 2的研究与固相合成法相比，溶胶凝胶法合成lini _ xco _ ( 1 - x ) o _ 2煅烧温度低，产物颗粒均匀一致，经过xrd的测试过后，结果表明750下烧结6 8小时，即可得到单相产物；烧结温度，掺杂剂的种类及掺杂剂量均对产物物相的形成产生影响，并对产物的结构产生影响。 |
