Combined operando X-ray diffraction-electrochemical impedance spectroscopy detecting solid solution reactions of LiFePO4 in batteries

Nature Communications
Michael HessPetr Novák

Abstract

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.

References

Nov 20, 2001·Nature·J M Tarascon, M Armand
Mar 6, 2003·Nature Materials·Sung-Yoon ChungYet-Ming Chiang
Feb 8, 2008·Nature·M Armand, J-M Tarascon
Jul 29, 2008·Nature Materials·Pierre GibotChristian Masquelier
Mar 13, 2009·Nature·Byoungwoo Kang, Gerbrand Ceder
May 24, 2011·Journal of the American Chemical Society·Marnix WagemakerFokko M Mulder
Jul 19, 2011·Nature Materials·Rahul MalikG Ceder
Feb 7, 2012·ACS Nano·Daniel A Cogswell, Martin Z Bazant
Apr 10, 2012·Journal of the American Chemical Society·Neeraj SharmaVanessa K Peterson
Apr 3, 2013·Journal of the American Chemical Society·Yuki OrikasaZempachi Ogumi
Apr 16, 2013·Nature Materials·Tsuyoshi SasakiPetr Novák
Aug 21, 2013·Journal of Synchrotron Radiation·P R WillmottR Wullschleger

❮ Previous
Next ❯

Citations

Dec 16, 2017·Science·Changbao ZhuJoachim Maier
Mar 4, 2018·Nature Communications·Young-Sang YuDavid A Shapiro
Jul 22, 2018·Nature Communications·Shunsuke KobayashiYuichi Ikuhara
May 11, 2017·Physical Chemistry Chemical Physics : PCCP·Inho NamJongheop Yi
Nov 7, 2018·ACS Applied Materials & Interfaces·Xiaolong GuoYong Chen
Jul 25, 2019·Inorganic Chemistry·Junnan Liu, Neeraj Sharma

❮ Previous
Next ❯

Methods Mentioned

BETA
X-ray

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.