Advanced Performance of Annealed Ni-P/(Etched Si) Negative Electrodes for Lithium-Ion Batteries
Advanced Performance of Annealed Ni-P/(Etched Si) Negative Electrodes for Lithium-Ion Batteries
复制标题
锂离子电池退火 Ni-P/（蚀刻硅）负极的先进性能
DOI：
10.1149/2.1211713jes
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发表时间：
2017
影响因子：
3.9
通讯作者：
Hiroki Sakaguchi,
中科院分区：
文献类型：
--
作者：
Yasuhiro Domi;Hiroyuki Usui;Masakuni Narita;Yoshihiro Fujita;Kazuki Yamaguchi;Hiroki Sakaguchi,
研究了不同处理方式的镍磷包覆硅（Ni-P /Si）负极锂离子电池的电化学性能。x射线衍射分析表明，退火后形成了硅化镍（NiSi和NiSi 2），提高了Ni-P涂层与Si颗粒之间的附着力。由于锚点效应，斑点状Ni-P颗粒即使在退火后也不会在蚀刻的Si表面聚集，而颗粒在未处理的Si表面聚集。在有机电解液中，经过退火处理的Ni-P /（蚀刻Si）负极即使在第100次循环时仍保持2000 mA hg - 1的放电容量，这可能是由于在充放电测试后，Ni-P颗粒仍残留在退火后的Ni-P /（蚀刻Si）电极表面。退火后的Ni-P /（蚀刻Si）电极在含成膜添加剂的有机电解质和离子液体电解质中分别表现出优异的循环性能，在750次和1100次循环中具有1000 mA hg−1的可逆容量。因此，Ni-P /（蚀刻Si）退火电极具有高可逆容量和长循环寿命。
The electrochemical performance of variously treated Ni–P–coated Si (Ni–P/Si) negative electrodes for lithium-ion batteries was investigated. X–ray diffraction analysis revealed the formation of nickel silicide (NiSi and NiSi 2) after annealing, which improved the adhesion between the Ni–P coating layer and Si particles. Spotty Ni–P particles did not aggregate on an etched Si surface due to an anchor effect, even after annealing, whereas the particles aggregated on an untreated Si surface. An annealed Ni–P/(etched Si) negative electrode maintained a discharge capacity of 2000 mA hg− 1 even at the 100th cycle in an organic electrolyte, which can be attributed to Ni–P particles remaining on the surface of the annealed Ni–P/(etched Si) electrode even after the charge–discharge test. The annealed Ni–P/(etched Si) electrode also exhibited superior cycle performance with a reversible capacity of 1000 mA hg− 1 over 750 and 1100 cycles in an organic electrolyte containing film–forming additive and an ionic liquid electrolyte, respectively. Consequently, the annealed Ni–P/(etched Si) electrode achieved both high reversible capacity and long cycle life.