Solid state CO2 sensor using an electrolyte in the system Li2CO3-Li3PO4-Al2O3

Narita, Hiroe; Can, Zhang Yi; Mizusaki, Junichiro; Tagawa, Hiroaki

doi:10.1016/0167-2738(95)00086-l

Cited by 29 publications

(13 citation statements)

References 4 publications

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“…It is important to note here that the electrochemical measurements were also carried out in an ambient air atmosphere, so the Li 2 CO 3 peak has a strong signal. This over layer of insoluble material Li 2 CO 3 blocks the diffusion of OH − [21] and dissolution of Mn 3+ ions from solid MnO 2 . This stabilizes the structure while preventing the usual formation of manganese oxy hydroxides (MnOOH, Mn(OH) 2 etc.)…”

Section: Cyclic Voltammetry Investigation Of γ -Mnomentioning

confidence: 99%

“…It can be interpreted in a way that Li 2 CO 3 is really an excellent ionic conductor for Li + ions. [21] This intercalation mechanism would open up a new field of rechargeable batteries in aqueous systems. We believe that the reduction reaction (intercalation of Li) in the MnO 2 host material proceeds through the over layer of Li 2 CO 3 , which blocks the diffusion of manganese hydroxides.…”

Section: Cyclic Voltammetry Investigation Of γ -Mnomentioning

confidence: 99%

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Surface analysis on discharged MnO₂ cathode using XPS and SIMS techniques

Minakshi

Thurgate

2008

Surface & Interface Analysis

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Manganese dioxide (MnO 2 ) appears to be an effective cathode material for a battery system. No studies on lithium insertion in aqueous media are known to the best of our knowledge. However, in one of our previous papers we reported that lithium could be intercalated into a MnO 2 host compound using an aqueous LiOH electrolyte; however simple chemistry suggests that it should not. It is found that a battery with LiOH electrolyte functions quite differently from the cell that uses Li 2 SO 4 . This paper describes the surface modifications that accompany the electrochemical behavior of MnO 2 during redox (discharge) processes in the lithium hydroxide and sulfate media. XPS and SIMS techniques were used to study the resultant surface of the MnO 2 cathode and the spectra reveal that the formation of an insoluble layer of Li 2 CO 3 precedes the process of reduction. SEM was used to study the microstructure of the MnO 2 cathode.

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Section: Cyclic Voltammetry Investigation Of γ -Mnomentioning

confidence: 99%

Section: Cyclic Voltammetry Investigation Of γ -Mnomentioning

confidence: 99%

Surface analysis on discharged MnO₂ cathode using XPS and SIMS techniques

Minakshi

Thurgate

2008

Surface & Interface Analysis

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“…K. The sintered body showed good mechanical stability, which is often not the case for solid solutions based on Li2CO 3 [5]. The sample was cut into pellets of about 1 cm in diameter by using a diamond wire saw.…”

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confidence: 99%

“…Particularly for CO2 gas sensors, some previous investigations were based on lithium ion conductors [5][6].…”

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confidence: 99%

Solid-state potentiometric CO2 sensor based on Li22co3-MgO electrolyte

Salam

Weppner

1998

Ionics

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Abstract.A type II solid state electrochemical CO, sensor was investigated using a two-phase mixture of Li2CO 3 and MgO as solid electrolyte and LiMn204 as reference electrode. The electromotive force of the galvanic cell, the reproducibility and the long-term stability of the sensor signal were examined under dry and humid conditions in the temperature range between 300 and 400 ~ The emf dependence on the partial pressure of COz follows a Nernstian type equation. The sensitivity to CO2 is affected by water vapor, but a logarithmic relationship of the emf on the CO2 partial pressure is also observed for humid gases. The cell shows long-term stability and good reproducibility of the sensor signal.

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“…For the effective suppression of CO 2 gas emission, a sensing tool applicable at every emitting site is greatly needed for the realization of the most effective way of global CO 2 suppression. Compact and inexpensive CO 2 sensors with a SnO 2 based semiconductor [1] and a solid electrolyte based on Li þ ion conducting glass ceramic using lithium carbonate as an auxiliary electrode [2] have been reported to be applicable in commercial use. However, in the atmosphere where carbon dioxide gas is generated, water vapor also appears at all times more or less.…”

mentioning

confidence: 99%