【摘 要】
:
Herein, N-Ti3C2@CNT microspheres are suc?cessfully synthesized by the simple spray drying method. In the preparation process, HCl-treated melamine (HTM) is sele
【机 构】
:
School of Materials Science and Engineering, Zhejiang University, 38 Zheda Road, Hangzhou 310027, Pe
论文部分内容阅读
Herein, N-Ti3C2@CNT microspheres are suc?cessfully synthesized by the simple spray drying method. In the preparation process, HCl-treated melamine (HTM) is selected as the sources of carbon and nitrogen. It not only realizes in situ growth of CNTs on the surface of MXene nanosheets with the catalysis of Ni, but also introduces effcient N-doping in both MXene and CNTs. Within the microsphere, MXene nanosheets interconnect with CNTs to form porous and conductive network. In addition, N-doped MXene and CNTs can provide strong chemical immobili?zation for polysulfides and effectively entrap them within the porous microspheres. Above-mentioned merits enable N-Ti3C2@CNT microspheres to be ideal sulfur host. When used in lithium–sulfur (Li–S) battery, the N-Ti3C2@CNT microspheres/S cathode delivers initial specific capac?ity of 927 mAh g?1 at 1 C and retains high capacity of 775 mAh g?1 after 1000 cycles with extremely low fading rate (FR) of 0.016% per cycle. Furthermore, the cathode still shows high cycling stability at high C-rate of 4 C (capacity of 647 mAh g?1 after 650 cycles, FR 0.027%) and high sulfur loading of 3 and 6 mg cm?2 for Li–S batteries.
其他文献
染发失败一头白发被剃光rn40多岁的邓先生年轻时就有“少年白”,近几年头发几乎全白了.rn最近他为了美观去把头发染黑了.没想到染发当天头皮就不舒服,几天后头上还开始流黄水
小张是O型血,丈夫是A型血,最近她听闻某位女明星生二胎时孩子出现了新生儿溶血症,很担心两人血型容易不合,会导致孩子得溶血症.rn其实是小张过虑了.首先,即使妈妈是O型,爸爸
老李的悲剧真的是由于长期的登山活动造成的吗?运动真的会伤害膝关节吗?浙江省中山医院副主任医师陈智能带你了解登山运动中的膝关节保护.rn关节运动是关节软骨的营养师rn软
The biggest challenging issue in photocataly-sis is effcient separation of the photoinduced carriers and the aggregation of photoexcited electrons on photocatal
Rechargeable alkaline batteries (RABs) have received remarkable attention in the past decade for their high energy, low cost, safe operation, facile manufacture
With the increase in the use of electronic devices in many different environments, a need has arisen for an easily implemented method for the rapid, sensitive d
Aqueous Zn ion batteries (ZIBs) are promising in energy storage due to the low cost, high safety, and material abundance. The development of metal oxides as the
Micro/nanomotors have been extensively explored for efficient cancer diagnosis and therapy, as evidenced by significant breakthroughs in the design of micro/nan
Ultrafast-charging energy storage devices are attrac-tive for powering personal elec-tronics and electric vehicles. Most ultrafast-charging devices are made of
Photodynamic therapy (PDT), as one of the noninvasive clinical cancer phototherapies, suffers from the key drawback associated with hypoxia at the tumor microen