Design and synthesis of hollow NiCo2O4 nanoboxes as anodes for lithium-ion and sodium-ion batteries. Issue 28 (29th June 2016)

• Record Type: Journal Article
• Authors: Chen, Junfen; Ru, Qiang; Mo, Yudi; Hu, Shejun; Hou, Xianhua
• Is Part Of: Physical chemistry chemical physics. Volume 18:Issue 28(2016)
• Page Start: 18949
• Page End: 18957
• Publication Date: 2016-06-29
• Subjects: Chemistry, Physical and theoretical -- Periodicals; 541.3
• DOI: 10.1039/c6cp02871c
• Languages: English
• ISSNs: 1463-9076

Abstract

Abstract : This work is about the synthesis of hollow NiCo2 O4 nanoboxes and their electrochemical performance for LIBs and SIBs. Abstract : Hollow porous NiCo2 O4 -nanoboxes (NCO-NBs) were synthesized with zeolitic imidazolate framework-67 (ZIF-67) nanocrystals as the template followed by a subsequent annealing treatment. The structure and morphology of the NCO-NBs were characterized using X-ray diffraction, field emission scanning electron microscopy and transmission electron microscopy. When tested as potential anode materials for lithium-ion batteries, these porous NCO-NBs with a well-defined hollow structure manifested enhanced performance of Li storage. The discharge capacity of the NCO-NBs remained 1080 mA h g −1 after 150 cycles at a current rate of 500 mA g −1 and 884 mA h g −1 could be obtained at a current density of 2000 mA g −1 after 200 cycles. Even when cycled at a high density of 8000 mA g −1, a comparable capacity of 630 mA h g −1 could be achieved. Meanwhile, the Na storage behavior of NCO-NBs as anode materials of sodium ion batteries (SIBs) was initially investigated and they exhibited a high initial discharge capacity of 826 mA h g −1, and a moderate capacity retention of 328 mA h g −1 was retained after 30 cycles. The improved electrochemical performance for NCO-NBs could be attributed to the hierarchical hollow structure and the desirable composition, which provide enough space to alleviate volume expansion during the Li + /Na + insertion/extraction process and facilitate rapid transport of ions and electrons.