PMID- 35514881
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20220716
IS  - 2046-2069 (Electronic)
IS  - 2046-2069 (Linking)
VI  - 10
IP  - 70
DP  - 2020 Nov 23
TI  - Material balance in the O(2) electrode of Li-O(2) cells with a porous carbon 
      electrode and TEGDME-based electrolytes.
PG  - 42971-42982
LID - 10.1039/d0ra07924c [doi]
AB  - This work figures out the material balance of the reactions occurring in the O(2) 
      electrode of a Li-O(2) cell, where a Ketjenblack-based porous carbon electrode 
      comes into contact with a tetraethylene glycol dimethyl ether (TEGDME)-based 
      electrolyte under more practical conditions of less electrolyte amount and high 
      areal capacity. The ratio of electrolyte weight to cell capacity (E/C, g A h(-1)) 
      is a good parameter to correlate with cycle life. Only 5 cycles were obtained at 
      an areal capacity of 4 mA h cm(-2) (E/C = 10) and a discharge/charge current 
      density of 0.4 mA cm(-2), which corresponds to the energy density of 170 W h 
      kg(-1) at a complete cell level. When the areal capacity was decreased to half 
      (E/C = 20) by setting a current density at 0.2 mA cm(-2), the cycle life was 
      extended to 18 cycles. However, the total electric charge consumed for parasitic 
      reactions was 35 and 59% at the first and the third cycle, respectively. This 
      surprisingly large amount of parasitic reactions was suppressed by half using 
      redox mediators at 0.4 mA cm(-2) while keeping a similar cycle life. Based on 
      by-product distribution, we will propose possible mechanisms of TEGDME 
      decomposition and report a water breathing behavior, where H(2)O is produced 
      during charge and consumed during discharge.
CI  - This journal is (c) The Royal Society of Chemistry.
FAU - Ue, Makoto
AU  - Ue M
AUID- ORCID: 0000-0002-3980-9478
AD  - Center for Green Research on Energy and Environmental Materials, National 
      Institute for Materials Science (NIMS) Japan macue01@gmail.com.
FAU - Asahina, Hitoshi
AU  - Asahina H
AUID- ORCID: 0000-0002-1837-9077
AD  - Center for Green Research on Energy and Environmental Materials, National 
      Institute for Materials Science (NIMS) Japan macue01@gmail.com.
AD  - SoftBank-NIMS Advanced Technologies Development Center 1-1 Namiki, Tsukuba 
      Ibaraki 305-0044 Japan.
FAU - Matsuda, Shoichi
AU  - Matsuda S
AUID- ORCID: 0000-0002-0640-3404
AD  - Center for Green Research on Energy and Environmental Materials, National 
      Institute for Materials Science (NIMS) Japan macue01@gmail.com.
AD  - SoftBank-NIMS Advanced Technologies Development Center 1-1 Namiki, Tsukuba 
      Ibaraki 305-0044 Japan.
FAU - Uosaki, Kohei
AU  - Uosaki K
AUID- ORCID: 0000-0001-8886-3270
AD  - Center for Green Research on Energy and Environmental Materials, National 
      Institute for Materials Science (NIMS) Japan macue01@gmail.com.
AD  - SoftBank-NIMS Advanced Technologies Development Center 1-1 Namiki, Tsukuba 
      Ibaraki 305-0044 Japan.
LA  - eng
PT  - Journal Article
DEP - 20201207
PL  - England
TA  - RSC Adv
JT  - RSC advances
JID - 101581657
PMC - PMC9058141
COIS- There are no conflicts to declare.
EDAT- 2020/12/07 00:00
MHDA- 2020/12/07 00:01
PMCR- 2020/12/07
CRDT- 2022/05/06 05:30
PHST- 2020/09/16 00:00 [received]
PHST- 2020/11/11 00:00 [accepted]
PHST- 2022/05/06 05:30 [entrez]
PHST- 2020/12/07 00:00 [pubmed]
PHST- 2020/12/07 00:01 [medline]
PHST- 2020/12/07 00:00 [pmc-release]
AID - d0ra07924c [pii]
AID - 10.1039/d0ra07924c [doi]
PST - epublish
SO  - RSC Adv. 2020 Dec 7;10(70):42971-42982. doi: 10.1039/d0ra07924c. eCollection 2020 
      Nov 23.