TY - JOUR
T1 - New hydrogen titanium phosphate sulfate electrodes for Li-ion and Na-ion batteries
AU - Zhao, Ran
AU - Mieritz, Daniel
AU - Seo, Dong Kyun
AU - Chan, Candace K.
N1 - Funding Information:
This work was supported by the American Chemical Society Petroleum Research Fund (52830-DNI10). D.M.?s work was partly supported by the Center for Bio-Inspired Solar Fuel Production, an Energy Frontier Research Center funded by the US Department of Energy, Office of Science, Office of Basic Energy Sciences under award number DE-SC0001016, and by a Multidisciplinary University Research Initiative (MURI) project funded by the Department of Defense through the Army Research Office (ARO) under award number W911NF-12-1-0420.
PY - 2017
Y1 - 2017
N2 - NASICON-type materials with general formula AxM2(PO4)3(A = Li or Na, M = Ti, V, and Fe) are promising candidates for Li- and Na-ion batteries due to their open three-dimensional framework structure. Here we report the electrochemical properties of hydrogen titanium phosphate sulfate, H0.4Ti2(PO4)2.4(SO4)0.6(HTPS), a new mixed polyanion material with NASICON structure. Micron-sized HTPS aggregates with crystallite grain size of ca. 23 nm are synthesized using a sol-gel synthesis in an acidic medium. The properties of the as-synthesized HTPS, ball-milled HTPS, and samples prepared as carbon composites using an in-situ glucose decomposition reaction are investigated. A capacity of 148 mAh g−1corresponding to insertion of 2 Li+per formula unit is observed in the ball-milled HTPS over the potential window of 1.5–3.4 V vs. Li/Li+. Lithiation at ca. 2.8 and 2.5 V is determined to occur through filling of the M1 and M2 sites, respectively. Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) are used characterize the HTPS before and after cycling. Evaluation of the HTPS in a Na-ion cell is also performed. A discharge capacity of 93 mAh g−1with sodiation at ca. 2.9 and 2.2 V vs. Na/Na+is observed.
AB - NASICON-type materials with general formula AxM2(PO4)3(A = Li or Na, M = Ti, V, and Fe) are promising candidates for Li- and Na-ion batteries due to their open three-dimensional framework structure. Here we report the electrochemical properties of hydrogen titanium phosphate sulfate, H0.4Ti2(PO4)2.4(SO4)0.6(HTPS), a new mixed polyanion material with NASICON structure. Micron-sized HTPS aggregates with crystallite grain size of ca. 23 nm are synthesized using a sol-gel synthesis in an acidic medium. The properties of the as-synthesized HTPS, ball-milled HTPS, and samples prepared as carbon composites using an in-situ glucose decomposition reaction are investigated. A capacity of 148 mAh g−1corresponding to insertion of 2 Li+per formula unit is observed in the ball-milled HTPS over the potential window of 1.5–3.4 V vs. Li/Li+. Lithiation at ca. 2.8 and 2.5 V is determined to occur through filling of the M1 and M2 sites, respectively. Powder X-ray diffraction (PXRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS) are used characterize the HTPS before and after cycling. Evaluation of the HTPS in a Na-ion cell is also performed. A discharge capacity of 93 mAh g−1with sodiation at ca. 2.9 and 2.2 V vs. Na/Na+is observed.
KW - Cathode
KW - Lithium battery
KW - NASICON
KW - Polyanion
KW - Sodium battery
KW - Titanate
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U2 - 10.1016/j.jpowsour.2017.01.057
DO - 10.1016/j.jpowsour.2017.01.057
M3 - Article
AN - SCOPUS:85009895065
VL - 343
SP - 197
EP - 206
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
ER -