Abstract
Recently, K-ion batteries (KIBs) have attracted attention for potential applications in next-generation energy storage devices principally on the account of their abundancy and lower cost. Herein, for the first time, we report an anatase TiO 2 -derived Magnéli phase Ti 6 O 11 as a novel anode material for KIBs. We incorporate pristine carbon nanotube (CNT) on the TiO 2 host materials due to the low electronic conductivity of the host materials. TiO 2 transformed to Magnéli phase Ti 6 O 11 after the first insertion/deinsertion of K ions. From the second cycle, Magnéli phase Ti 6 O 11 /CNT composite showed reversible charge/discharge profiles with ∼150 mA h g -1 at 0.05 A g -1 . Ex situ X-ray diffraction and transmission electron microscopy analyses revealed that the charge storage process of Magnéli phase Ti 6 O 11 proceeded via the conversion reaction during potassium ion insertion/deinsertion. The Magnéli phase Ti 6 O 11 /CNT composite electrode showed long-term cycling life over 500 cycles at 200 mA g -1 , exhibiting a capacity retention of 76% and a high Coulombic efficiency of 99.9%. These salient results presented here provide a novel understanding of the K-ion storage mechanisms in the extensively investigated oxide-based material for Li-ion batteries and Na-ion batteries, shedding light on the development of promising electrode materials for next-generation batteries.
| Original language | English |
|---|---|
| Pages (from-to) | 5304-5309 |
| Number of pages | 6 |
| Journal | ACS Omega |
| Volume | 4 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - 2019 Mar 14 |
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All Science Journal Classification (ASJC) codes
- Chemistry(all)
- Chemical Engineering(all)
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Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries. / Lee, Geon Woo; Park, Byung Hoon; Nazarian-Samani, Masoud; Kim, Young Hwan; Roh, Kwang Chul; Kim, Kwang Bum.
In: ACS Omega, Vol. 4, No. 3, 14.03.2019, p. 5304-5309.Research output: Contribution to journal › Article
TY - JOUR
T1 - Magnéli Phase Titanium Oxide as a Novel Anode Material for Potassium-Ion Batteries
AU - Lee, Geon Woo
AU - Park, Byung Hoon
AU - Nazarian-Samani, Masoud
AU - Kim, Young Hwan
AU - Roh, Kwang Chul
AU - Kim, Kwang Bum
PY - 2019/3/14
Y1 - 2019/3/14
N2 - Recently, K-ion batteries (KIBs) have attracted attention for potential applications in next-generation energy storage devices principally on the account of their abundancy and lower cost. Herein, for the first time, we report an anatase TiO 2 -derived Magnéli phase Ti 6 O 11 as a novel anode material for KIBs. We incorporate pristine carbon nanotube (CNT) on the TiO 2 host materials due to the low electronic conductivity of the host materials. TiO 2 transformed to Magnéli phase Ti 6 O 11 after the first insertion/deinsertion of K ions. From the second cycle, Magnéli phase Ti 6 O 11 /CNT composite showed reversible charge/discharge profiles with ∼150 mA h g -1 at 0.05 A g -1 . Ex situ X-ray diffraction and transmission electron microscopy analyses revealed that the charge storage process of Magnéli phase Ti 6 O 11 proceeded via the conversion reaction during potassium ion insertion/deinsertion. The Magnéli phase Ti 6 O 11 /CNT composite electrode showed long-term cycling life over 500 cycles at 200 mA g -1 , exhibiting a capacity retention of 76% and a high Coulombic efficiency of 99.9%. These salient results presented here provide a novel understanding of the K-ion storage mechanisms in the extensively investigated oxide-based material for Li-ion batteries and Na-ion batteries, shedding light on the development of promising electrode materials for next-generation batteries.
AB - Recently, K-ion batteries (KIBs) have attracted attention for potential applications in next-generation energy storage devices principally on the account of their abundancy and lower cost. Herein, for the first time, we report an anatase TiO 2 -derived Magnéli phase Ti 6 O 11 as a novel anode material for KIBs. We incorporate pristine carbon nanotube (CNT) on the TiO 2 host materials due to the low electronic conductivity of the host materials. TiO 2 transformed to Magnéli phase Ti 6 O 11 after the first insertion/deinsertion of K ions. From the second cycle, Magnéli phase Ti 6 O 11 /CNT composite showed reversible charge/discharge profiles with ∼150 mA h g -1 at 0.05 A g -1 . Ex situ X-ray diffraction and transmission electron microscopy analyses revealed that the charge storage process of Magnéli phase Ti 6 O 11 proceeded via the conversion reaction during potassium ion insertion/deinsertion. The Magnéli phase Ti 6 O 11 /CNT composite electrode showed long-term cycling life over 500 cycles at 200 mA g -1 , exhibiting a capacity retention of 76% and a high Coulombic efficiency of 99.9%. These salient results presented here provide a novel understanding of the K-ion storage mechanisms in the extensively investigated oxide-based material for Li-ion batteries and Na-ion batteries, shedding light on the development of promising electrode materials for next-generation batteries.
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U2 - 10.1021/acsomega.9b00045
DO - 10.1021/acsomega.9b00045
M3 - Article
AN - SCOPUS:85062841162
VL - 4
SP - 5304
EP - 5309
JO - ACS Omega
JF - ACS Omega
SN - 2470-1343
IS - 3
ER -