Combined operando X-ray diffraction-electrochemical impedance spectroscopy detecting solid solution reactions of LiFePO4 in batteries
| LEADER | caa a22 4500 | ||
|---|---|---|---|
| 001 | 528785877 | ||
| 005 | 20190713030955.0 | ||
| 007 | cr unu---uuuuu | ||
| 008 | 180924s2015 xx s 000 0 eng | ||
| 024 | 7 | 0 | |a 10.3929/ethz-b-000104246 |2 doi |
| 024 | 7 | 0 | |a 10.1038/ncomms9169 |2 doi |
| 035 | |a (ETHRESEARCH)oai:www.research-collecti.ethz.ch:20.500.11850/104246 | ||
| 245 | 0 | 0 | |a Combined operando X-ray diffraction-electrochemical impedance spectroscopy detecting solid solution reactions of LiFePO4 in batteries |h [Elektronische Daten] |c [Michael Hess, Tsuyoshi Sasaki, Claire Villevieille, Petr; id_orcid 0000-0001-6993-5021 Novak] |
| 246 | 0 | |a Nat Commun | |
| 506 | |a Open access |2 ethresearch | ||
| 520 | 3 | |a Lithium-ion batteries are widely used for portable applications today; however, often suffer from limited recharge rates. One reason for such limitation can be a reduced active surface area during phase separation. Here we report a technique combining high-resolution operando synchrotron X-ray diffraction coupled with electrochemical impedance spectroscopy to directly track non-equilibrium intermediate phases in lithium-ion battery materials. LiFePO4, for example, is known to undergo phase separation when cycled under low-current-density conditions. However, operando X-ray diffraction under ultra-high-rate alternating current and direct current excitation reveal a continuous but current-dependent, solid solution reaction between LiFePO4 and FePO4 which is consistent with previous experiments and calculations. In addition, the formation of a preferred phase with a composition similar to the eutectoid composition, Li0.625FePO4, is evident. Even at a low rate of 0.1C, ∼20% of the X-ray diffractogram can be attributed to non-equilibrium phases, which changes our understanding of the intercalation dynamics in LiFePO4. | |
| 540 | |a Creative Commons Attribution 4.0 International |u http://creativecommons.org/licenses/by/4.0 |2 ethresearch | ||
| 700 | 1 | |a Hess |D Michael |e joint author | |
| 700 | 1 | |a Sasaki |D Tsuyoshi |e joint author | |
| 700 | 1 | |a Villevieille |D Claire |e joint author | |
| 700 | 1 | |a Novak |D Petr; id_orcid 0000-0001-6993-5021 |e joint author | |
| 773 | 0 | |t Nature Communications |d London : Nature Publishing Group |g 6, p. 8169 |x 2041-1723 | |
| 856 | 4 | 0 | |u http://hdl.handle.net/20.500.11850/104246 |q text/html |z WWW-Backlink auf das Repository (Open access) |
| 908 | |D 1 |a Journal Article |2 ethresearch | ||
| 950 | |B ETHRESEARCH |P 856 |E 40 |u http://hdl.handle.net/20.500.11850/104246 |q text/html |z WWW-Backlink auf das Repository (Open access) | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Hess |D Michael |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Sasaki |D Tsuyoshi |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Villevieille |D Claire |e joint author | ||
| 950 | |B ETHRESEARCH |P 700 |E 1- |a Novak |D Petr; id_orcid 0000-0001-6993-5021 |e joint author | ||
| 950 | |B ETHRESEARCH |P 773 |E 0- |t Nature Communications |d London : Nature Publishing Group |g 6, p. 8169 |x 2041-1723 | ||
| 898 | |a BK010053 |b XK010053 |c XK010000 | ||
| 949 | |B ETHRESEARCH |F ETHRESEARCH |b ETHRESEARCH |j Journal Article |c Open access | ||