In Situ Conductivity Measurements of LiCoO2 Film during Lithium Insertion/Extraction by Using Interdigitated Microarray Electrodes

Shibuya, Mashio; Nishina, Tatsuo; Matsue, Tomokazu; Uchida, Isamu

doi:10.1149/1.1837180

Cited by 139 publications

(65 citation statements)

References 1 publication

(1 reference statement)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It is clear that in such a nanoporous system, the uptake of electrons and hence the capacitance C ∼ = C solid can be huge. When we extrapolate this to a system with "pores" of atomic dimensions we end up with an all-solid phase, where ions such as H + or Li + can intercalate in the solid lattice itself to compensate for the charge of electrons [26][27][28]. This type of system is used to store electrical energy in batteries.…”

Section: E-mail Address: Daniel@physuunl (D Vanmaekelbergh)mentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical gating: A method to tune and monitor the (opto)electronic properties of functional materials

Vanmaekelbergh

Houtepen

Kelly

2007

Electrochimica Acta

View full text Add to dashboard Cite

Electrochemical polarization of a crystalline, polymeric or nanoporous system or a single molecule may change the density of charge carriers in a controlled way, and hence the optical and electrical properties. If the system has two contacts, its electronic conductivity can be measured in situ as a function of the charge carrier density that is varied by the electrochemical potential. This is called electrochemical gating. Such investigations can reveal the nature of the charge carriers (mobile or localized) and the mechanism of electronic conduction. Here, we present a brief review of a number of systems including inorganic crystals, polymers, nanoporous quantum-dot solids, and single molecules for which electrochemical gating was used successfully in the study of the electronic properties.

show abstract

Section: E-mail Address: Daniel@physuunl (D Vanmaekelbergh)mentioning

confidence: 99%

“…In the field of rechargeable batteries Li + ion intercalation in solids (a reaction similar to the proton reaction above) is important [27,28]. The transistor geometry has been used by various groups to investigate lithium intercalation.…”

Section: Intercalation In Inorganic Solidsmentioning

confidence: 99%

Electrochemical gating: A method to tune and monitor the (opto)electronic properties of functional materials

Vanmaekelbergh

Houtepen

Kelly

2007

Electrochimica Acta

View full text Add to dashboard Cite

show abstract

“…33,34 Additionally, we want to suggest the use of a new reference electrode for measurement of the electrode potentials in this study. The electrode potentials are usually measured using Li metal based on the equilibrium potential 35,36 of Li/Li + . However, it cannot be asserted to be safe using an alkali metal because the equilibrium potential of Li/Li + is not steady over a long period of time due to the surface of the alkali metal being easily oxidized.…”

Section: ͓2͔mentioning

confidence: 99%

Studying a Phenomenon during Overcharge of a Lithium-Ion Battery with Methacrylate Additives for the Gel Electrolyte

Nozu

Nakamura

Banno

et al. 2006

J. Electrochem. Soc.

View full text Add to dashboard Cite

A lithium-ion battery containing methacrylate compounds as "additives" in the gel electrolyte has been developed such that an increase in its voltage greater than normal does not cause a thermal runaway. This phenomenon was studied by analysis of the positive active material, lithium cobaltate ͑LiCoO 2 ͒, by measurement of the species on the negative electrode and the composition of the generated gases, and by estimating the abundance of the species in the electrolyte after/during charging the battery. The potential of the positive electrode maintained a constant value, the crystals of the positive material did not change, metallic Li and oxides of Li were produced on the negative electrode, CO 2 and CO were generated, and the relative abundance of the species from the additives did not change during overcharging of the battery. We postulated that, in the lithium-ion battery sample with the additives, oxygen gas and/or carbon dioxide gas is generated at the positive electrode during overcharge, moves to the negative electrode, and oxidizes the Li deposited on the negative electrode. This reaction process has been suggested to be similar to that observed on overcharging of Ni-Cd or Ni-MH sealed batteries, and the battery with the additives remained safe during the overcharge. The lithium-ion battery has been developed for cellular phones and notebook PCs since it was put to practical use in 1991.1 At that time, the lithium-ion battery was manufactured using lithium cobaltate ͑LiCoO 2 ͒, lithium nickelate ͑LiNiO 2 ͒ or lithium manganate ͑LiMn 2 O 4 ͒ as the positive electrode material, carbon that could intercalate and release lithium ion as the negative electrode material, and an organic solvent that dissolves the lithium salt as the electrolyte. 2-4The lithium-ion battery with LiCoO 2 as the positive material was put into practical use earlier than LiNiO 2 and LiMn 2 O 4 because it has good characteristics which are a high discharge voltage and a long cycle life. [5][6][7] Recently, the lithium-ion battery has been expected to be used in electric vehicles and the HEV; 8 therefore, a less expensive and more long-lived battery has been requested. Because the cobalt reserves are extremely low at about eight million t/year and are expensive, 9 LiCoO 2 is expected to shift to LiNiO 2 and LiMn 2 O 4 in the future. However, the discharge voltage of the lithium-ion battery with LiNiO 2 as the positive material is low, about 3.8 V. The synthesis of LiNiO 2 is difficult and the cycle life of the lithium-ion battery with LiNiO 2 is shorter because LiNiO 2 , which has the unstable state of Ni 3+ at high temperature, easily becomes a nonstoichiometric compound.10-12 Although LIMn 2 O 4 is less expensive and thermally stable, the capacity of the lithium-ion battery with LiMn 2 O 4 during cycle life decreases remarkably because manganese elutes into electrolyte easily.5,13,14 Therefore, advanced developments are needed so that the lithium-ion battery with LiNiO 2 or LiMn 2 O 4 can be put into practical use, and the lithiumion ...

show abstract

“…Therefore, in situ measurements are needed to correlate changes in the electrode to its physical properties. For example, Shibuya et al 1 investigated the electronic conductivity of a composite cathode in a lithium battery, and Saab et al 2 the ionic and electronic conductivities of Nafion/ carbon composites. Shibuya et al 1 used an interdigitated array of electrodes to measure the electronic conductivity of Li x CoO 2 while simultaneously intercalating ͑or deintercalating͒ lithium into it.…”

mentioning

confidence: 99%

“…In other words, charge-transfer or ionic resistance must be the dominant resistance for to be determined from a single data point. For situations when this condition does not hold, the technique used by Shibuya et al 1 would yield only a combination of ionic, electronic, and chargetransfer resistances, not just the electronic resistance of the solid phase. In order to decouple the various resistances, a more complete set of data ͑e.g., different experimental configurations, full impedance spectrum͒ must be analyzed to accurately determine the ionic, electronic, and charge-transfer resistances.…”

mentioning

confidence: 99%

Theoretical Analysis for Obtaining Physical Properties of Composite Electrodes

Gomadam

Weidner

Zawodzinski

et al. 2003

J. Electrochem. Soc.

View full text Add to dashboard Cite

A theoretical analysis is presented that allows in situ measurements of the physical properties of a composite electrode, namely, the electronic conductivity, the ionic conductivity, the exchange-current density, and the double-layer capacitance. Use is made of the current-voltage responses of the composite electrode to dc and ac polarizations under three different experimental configurations. This analysis allows the physical properties to be obtained even when the various resistances in the composite ͑e.g., ionic, electronic, and charge-transfer͒ are of comparable values.

show abstract

In Situ Conductivity Measurements of LiCoO2 Film during Lithium Insertion/Extraction by Using Interdigitated Microarray Electrodes

Cited by 139 publications

References 1 publication

Electrochemical gating: A method to tune and monitor the (opto)electronic properties of functional materials

Electrochemical gating: A method to tune and monitor the (opto)electronic properties of functional materials

Studying a Phenomenon during Overcharge of a Lithium-Ion Battery with Methacrylate Additives for the Gel Electrolyte

Theoretical Analysis for Obtaining Physical Properties of Composite Electrodes

Contact Info

Product

Resources

About