Journal
CHEMISTRY-A EUROPEAN JOURNAL
Volume 22, Issue 3, Pages 1021-1029Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/chem.201504154
Keywords
C@NiCoP; HER; lithium-ion batteries; nanotechnology; peapods
Categories
Funding
- Thousand Young Talents Program of the Chinese Central Government [0220002102003]
- National Natural Science Foundation of China (NSFC) [21373280, 21403019]
- Fundamental Research Funds for the Central Universities [0301005202017]
- Beijing National Laboratory for Molecular Sciences (BNLMS)
- Hundred Talents Program at Chongqing University [0903005203205]
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The superior properties of nanomaterials with a special structure can provide prospects for highly efficient water splitting and lithium storage. Herein, we fabricated a series of peapodlike C@Ni2-xCoxP (x <= 1) nanocomposites by an anion-exchange pathway. The experimental results indicated that the HER activity of C@Ni2-xCoxP catalyst is strongly related to the Co/Ni ratio, and the C@NiCoP got the highest HER activity with low onset potential of similar to 45 mV, small Tafel slope of similar to 43 mV dec(-1), large exchange current density of 0.21 mAc m(-2), and high long-term durability (60 h) in 0.5M H2SO4 solutions. Equally importantly, as an anode electrode for lithium batteries, this peapodlike C@NiCoP nanocomposite gives excellent charge-discharge properties (e.g., specific capacity of 670 mAh g(-1) at 0.2 A g(-1) after 350 cycles, and a reversible capacity of 405 mAh g(-1) at a high current rate of 10 A g(-1)). The outstanding performance of C@NiCoP in HER and LIBs could be attributed to the synergistic effect of the rational design of peapodlike nanostructures and the introduction of Co element.
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