JP2019160804A - レドックスフロー電池の充電状態確定方法及び基準電極の較正方法 - Google Patents
レドックスフロー電池の充電状態確定方法及び基準電極の較正方法 Download PDFInfo
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Abstract
Description
(a)初期時刻に前記半電池内の前記電解質の第1の平衡半電池還元電位を測定し、
(b)前記半電池内の電解質の溶液に既知の量の電流を特定の時間流して、次式4によりdS値を計算する。
(c)既知の時間にわたって既知の量の電流を流した後の前記電解質の第2の平衡半電池還元電位を測定して該第2の平衡半電池還元電位と前記第1の平衡半電池還元電位との間の差であるdEを求め、
(d)次式5によりdE/dSの比を使用してSを解き、これにより前記電解質の充電状態を確定する。
(i)第1のレドックス活性材料を含む第1の水性電解質及び(ii)第1の水性電解質に接触している第1の電極を備える第1のセルと、
(i)第2のレドックス活性材料を含む第2の水性電解質及び(ii)第2の水性電解質に接触している第2の電極を備える第2のセルと、
第1及び第2の水性電解質の間に配置された膜を含むセパレータと、
を含んで構成されている。いくつかの好適な実施形態では、膜はアイオノマー膜である。
(1)レドックスフロー電池内の第1のセル内の第1の電解質の充電状態を、上記第1の発明によって確定し、
(2)レドックスフロー電池内の第2のセル内の第2の電解質の充電状態を、上記第1の発明によって確定し、
(3)第1及び第2のセル内の第1及び第2の電解質間の充電状態の差を求め、
(4)第1及び第2の電解質間の充電状態の差が第1の所定値を超えた場合、第1及び第2の電解質間の充電状態の差が第1の所定値よりも小さい第2の所定値未満になるように少なくとも1つのセルを再充電する、ことを含んで構成されている。
(a)上記第1の方法により、酸化/還元プローブが配置された半電池内に含まれ、標準平衡半電池還元電位E0で特徴付けられるレドックス活性材料を含む電解質の充電状態Sを確定し、
(b)較正対象の酸化/還元プローブを用いて半電池内の電解質の平衡半電池還元電位Emeasを測定し、
(c)上記第1の方法により確定された充電状態と電解質の標準平衡半電池還元電位E0との間の、次式2で示す既知の関係に基づいて算出される電解質の理論上の平衡半電池還元電位Eeqを決定する。
(d)理論上の平衡半電池還元電位Eeqと測定された平衡半電池還元電位Emeasとの間の差を求め、
(e)この差を用いて酸化/還元プローブを較正する、
ことを含んで構成されている。
(i)第1のレドックス活性材料を含む第1の水性電解質及び(ii)第1の水性電解質に接触している第1の電極を備える第1のセルと、
(i)第2のレドックス活性材料を含む第2の水性電解質及び(ii)第2の水性電解質に接触している第2の電極を備える第2のセルと、
第1及び第2の水性電解質の間に配置された膜を含むセパレータと、を含んで構成されている。いくつかの好適な実施形態では、上記膜はアイオノマー膜である。
本明細書全体を通して、用語には当業者に理解されるような通常の意味が与えられる。しかしながら、誤解を避けるため、いくつかの用語の意味を具体的に定義又は明確化する。
以下の実施例は、本開示内に記載する概念のいくつかを例示するために与えられる。各実施例は、組成、調製及び使用の方法について特定の個別の実施形態を与えると見なされるが、どの実施例も本明細書に記載するもっと一般的な実施形態を限定するものとは見なされない。
Claims (17)
- レドックスフロー電池内で動作する半電池内にレドックス活性材料を含有し、任意の所与の時点で瞬時の平衡半電池還元電位を示す電解質の充電状態を確定する方法であって、
(a)初期時刻に前記半電池内の電解質の第1の平衡半電池還元電位を測定し、
(b)前記半電池内の電解質の溶液に既知の量の電流を特定の時間流して、次式によりdS値を計算し、
ここで、
Aは前記電解質を流れる電流
hは前記電解質を電流が流れた時間数
cは前記電解質内の活性材料の濃度
Vは前記電解質の体積
Fはファラデー定数
(c)既知の時間にわたって既知の量の電流を流した後の前記電解質の第2の平衡半電池還元電位を測定して該第2の平衡半電池還元電位と前記第1の平衡半電池還元電位との間の差であるdEを求め、
(d)次式によりdE/dSの比を使用してSを解き、
ここで、
Tは前記電解質の温度
Rは気体定数
nは反応に関与する電子の数
これにより前記電解質の充電状態を確定する、方法。 - 前記平衡半電池還元電位が炭素電極及びAg/AgCl基準電極を用いて測定される請求項1に記載の方法。
- 前記炭素電極がガラス状炭素電極である請求項2に記載の方法。
- 前記平衡半電池還元電位の変化率(dE/dS)の相関付けが前記半電池の充電状態Sを前記平衡半電池還元電位の変化率に関係付けられる一組の較正データを用いて行われる請求項1〜3のいずれか1項に記載の方法。
- 前記平衡半電池還元電位の変化率(dE/dS)と前記半電池の充電状態Sとの関係がネルンストの式に従う請求項1〜4のいずれか1項に記載の方法。
- 前記平衡半電池還元電位の変化率(dE/dS)と前記半電池の充電状態Sとの関係がネルンストの式に従わない請求項1〜4のいずれか1項に記載の方法。
- 前記半電池が、
(i)第1のレドックス活性材料を含む第1の水性電解質及び(ii)該第1の水性電解質に接触している第1の電極を備える第1のセルと、
(i)第2のレドックス活性材料を含む第2の水性電解質及び(ii)該第2の水性電解質に接触している第2の電極を備える第2のセルと、
前記第1及び第2の水性電解質の間に配置された膜を含むセパレータと、
を含んで構成され、
前記第1及び第2の電極が、前記半電池内の前記電解質の溶液に電荷が流入するにつれて変化する前記電解質の前記平衡半電池還元電位の変化率を測定するために用いられる電極と同じものではないフロー電池の前記第1のセル又は第2のセルのいずれかである請求項1〜6のいずれか1項に記載の方法。 - 前記膜がアイオノマー膜である請求項7に記載の方法。
- レドックスフロー電池の2つのセル間で充電状態を平衡させる方法であって、
(1)前記レドックスフロー電池内の第1のセル内の第1の電解質の充電状態を請求項1に記載の方法によって確定し、
(2)前記レドックスフロー電池内の第2のセル内の第2の電解質の充電状態を請求項1に記載の方法によって確定し、
(3)前記第1及び第2のセル内の前記第1及び第2の電解質間の充電状態の差を求め、
(4)前記第1及び第2の電解質間の充電状態の前記差が第1の所定値を超えた場合、前記第1及び第2の電解質間の充電状態の前記差が前記第1の所定値よりも小さい第2の所定値未満になるように少なくとも1つのセルを再充電する、
ことを含んで構成された方法。 - 平衡半電池還元電位が炭素電極及びAg/AgCl基準電極を備える酸化還元電位プローブを用いて測定される請求項9に記載の方法。
- 前記炭素電極がガラス状炭素電極である請求項10に記載の方法。
- 平衡半電池還元電位の変化率の相関付けが前記第1及び第2のセルの充電状態を前記平衡半電池還元電位の変化率に関係付けられる一組の較正データを用いて行われる請求項9〜11のいずれか1項に記載の方法。
- 平衡半電池還元電位の変化率と前記セルの充電状態との関係がネルンストの式に従う請求項9〜12のいずれか1項に記載の方法。
- 平衡半電池還元電位の変化率と前記セルの充電状態との関係がネルンストの式に従わない請求項9〜12のいずれか1項に記載の方法。
- 前記第1及び第2のセル間にアイオノマー膜を含むセパレータが配置されている請求項9〜14のいずれか1項に記載の方法。
- 酸化/還元プローブを較正する方法であって、
(a)請求項1に記載の方法により、前記酸化/還元プローブが配置された半電池内に含まれ、標準平衡半電池還元電位E0で特徴付けられるレドックス活性材料を含む電解質の充電状態Sを確定し、
(b)較正対象の前記酸化/還元プローブを用いて前記半電池内の前記電解質の平衡半電池還元電位Emeasを測定し、
(c)請求項1に記載の方法により確定された充電状態と前記電解質の標準平衡半電池還元電位E0との間の、次式で示す既知の関係に基づいて算出される電解質の理論上の平衡半電池還元電位Eeqを確定し、
ここで、Rは気体定数、Tは電解質の温度、nは反応に関与する電子数、Fはファラデー定数
(d)前記理論上の平衡半電池還元電位Eeqと前記測定された平衡半電池還元電位Emeasとの間の差を求め、
(e)前記差を用いて前記酸化/還元プローブを較正する、
ことを含んで構成された方法。 - 前記平衡半電池還元電位が炭素電極及びAg/AgCl基準電極を用いて測定される請求項16に記載の方法。
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KR20160086845A (ko) | 2016-07-20 |
US10388978B2 (en) | 2019-08-20 |
JP2016540347A (ja) | 2016-12-22 |
CA2927993C (en) | 2021-10-26 |
CN105723553B (zh) | 2019-05-17 |
EP3069403A4 (en) | 2017-06-07 |
ES2818075T3 (es) | 2021-04-09 |
EP3069403B1 (en) | 2020-06-17 |
CN105723553A (zh) | 2016-06-29 |
US20160254562A1 (en) | 2016-09-01 |
CA2927993A1 (en) | 2015-05-21 |
DK3069403T3 (da) | 2020-09-07 |
MX2016005908A (es) | 2016-08-17 |
EP3069403A1 (en) | 2016-09-21 |
JP6890151B2 (ja) | 2021-06-18 |
WO2015073286A1 (en) | 2015-05-21 |
KR102253907B1 (ko) | 2021-05-18 |
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