采用水热法制备了不同Ag修饰量的Ag/MoO_2纳米复合材料,并利用浸渍法将其负载在多孔泡沫镍(Nickel foam,NF)上制备成Ag/MoO_2/NF无粘结剂型直接电极。在该电极中Ag/MoO_2纳米颗粒均匀地负载在泡沫镍上形成了三维网络结构,其中MoO_2纳米...采用水热法制备了不同Ag修饰量的Ag/MoO_2纳米复合材料,并利用浸渍法将其负载在多孔泡沫镍(Nickel foam,NF)上制备成Ag/MoO_2/NF无粘结剂型直接电极。在该电极中Ag/MoO_2纳米颗粒均匀地负载在泡沫镍上形成了三维网络结构,其中MoO_2纳米颗粒是由~10 nm的纳米晶组成。当Ag修饰量为5%时,Ag0.05/MoO_2/NF具有最佳的电化学性能:在0.1 C的电流密度下,首次放电比容量高达1180 m Ah/g,100次循环后仍保持805 m Ah/g;且当电流密度由2 C降低至0.1 C时,比容量由468 m Ah/g升高至820 m Ah/g,表现出优异的储锂性能。展开更多
MoOnanocrystals(NCs) on Ni foam were simply synthesized via a facile hydrothermal method and a dip-coating method. It was worth noting that ultrafine interconnected MoOnanocrystals(about 10 nm) were uniformly anchored...MoOnanocrystals(NCs) on Ni foam were simply synthesized via a facile hydrothermal method and a dip-coating method. It was worth noting that ultrafine interconnected MoOnanocrystals(about 10 nm) were uniformly anchored on Ni foam to fabricate a particular three-dimensional architecture, which may provide more active sites and shorter transmission pathways for lithium ions. As binder-free anode, MoONCs on Ni foam deliver a high initial discharge capacity of 990 mAh·gand retain a reversible capacity of 924 mAh· g(-1) after 100 cycles at a current density of 0.1 C. More importantly, when the current density returns from 2 C to 0.1 C, the capacity recovers to 910 mAh·g(-1)(about 92% of the original high capacity), suggesting excellent cycling stability and rate capability. The particular 3 D electrode as binder-free anode makes it a promising anode candidate for high-performance lithium-ion batteries.展开更多
文摘采用水热法制备了不同Ag修饰量的Ag/MoO_2纳米复合材料,并利用浸渍法将其负载在多孔泡沫镍(Nickel foam,NF)上制备成Ag/MoO_2/NF无粘结剂型直接电极。在该电极中Ag/MoO_2纳米颗粒均匀地负载在泡沫镍上形成了三维网络结构,其中MoO_2纳米颗粒是由~10 nm的纳米晶组成。当Ag修饰量为5%时,Ag0.05/MoO_2/NF具有最佳的电化学性能:在0.1 C的电流密度下,首次放电比容量高达1180 m Ah/g,100次循环后仍保持805 m Ah/g;且当电流密度由2 C降低至0.1 C时,比容量由468 m Ah/g升高至820 m Ah/g,表现出优异的储锂性能。
基金Funded by the National Natural Science Foundation of China(51506155)
文摘MoOnanocrystals(NCs) on Ni foam were simply synthesized via a facile hydrothermal method and a dip-coating method. It was worth noting that ultrafine interconnected MoOnanocrystals(about 10 nm) were uniformly anchored on Ni foam to fabricate a particular three-dimensional architecture, which may provide more active sites and shorter transmission pathways for lithium ions. As binder-free anode, MoONCs on Ni foam deliver a high initial discharge capacity of 990 mAh·gand retain a reversible capacity of 924 mAh· g(-1) after 100 cycles at a current density of 0.1 C. More importantly, when the current density returns from 2 C to 0.1 C, the capacity recovers to 910 mAh·g(-1)(about 92% of the original high capacity), suggesting excellent cycling stability and rate capability. The particular 3 D electrode as binder-free anode makes it a promising anode candidate for high-performance lithium-ion batteries.
