10 0

Capacity Degradation Mechanism and Cycling Stability Enhancement of AIF(3)-Coated Nanorod Gradient Na[Ni0.65Co0.08Mn0.27]O-2 Cathode for Sodium-Ion Batteries

Title
Capacity Degradation Mechanism and Cycling Stability Enhancement of AIF(3)-Coated Nanorod Gradient Na[Ni0.65Co0.08Mn0.27]O-2 Cathode for Sodium-Ion Batteries
Author
황장연
Keywords
Ni-rich layered oxide cathode; AIF(3) coating; gradient cathode; Na-ion batteries; O3-type cathode; degradation mechanism; HR-TEM
Issue Date
2018-12
Publisher
AMER CHEMICAL SOC
Citation
ACS NANO, v. 12, no. 12, page. 12912-12922
Abstract
O3-type Na[NixCoyMnz]O-2 materials are attractive cathodes for sodium-ion batteries because of their full cell fabrication practicality, high energy density, and relatively easy technology transfer arising from their similarity to Li[NixCoyMnz]O-2 materials, yet their performance viability with Ni-rich composition (x >= 0.6) is still doubtful. More importantly, their capacity degradation mechanism remains to be established. In this paper, we introduce an O3-type Ni-rich AIF(3)-coated nanorod gradient Na[Ni0.65Co0.08Mn0.27]O-2 cathode with enhanced electro-chemical performance in both half-cells and full cells. AIF(3)-coated nanorod gradient Na[Ni0.65Co0.08Mn0.27]O-2 particles were synthesized through a combination of dry ball-mill coating and columnar composition gradient design and deliver a discharge capacity of 168 mAh g(-1) with 90% capacity retention in half cells (50 cycles) and 132 mAh g(-1) with 90% capacity retention in full cells (200 cycles) at 75 mA g(-1) (0.5C, 1.5-4.1 V). Through analysis of the cycled electrodes, the capacity-degradation mechanism was unraveled in O3-type Ni-rich Na[NixCoyMnz]O-2 from a structural perspective with emphasis on high-resolution transmission electron microscopy, providing valuable information on improving O3-type Na[NixCoyMnz]O-2 cathode performance.
URI
https://pubs.acs.org/doi/10.1021/acsnano.8b08266http://repository.hanyang.ac.kr/handle/20.500.11754/120950
ISSN
1936-0851; 1936-086X
DOI
10.1021/acsnano.8b08266
Appears in Collections:
CENTER FOR CREATIVE CONVERGENCE EDUCATION[S](창의융합교육원) > ETC
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE