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In situ observation of the electrochemical behavior of Li–CO 2 /O 2 batteries in an environmental transmission electron microscope
Ist Teil von
Carbon energy, 2024-04, Vol.6 (4)
Erscheinungsjahr
2024
Quelle
Wiley Online Library
Beschreibungen/Notizen
Abstract
Li–CO
2
/O
2
batteries, a promising energy storage technology, not only provide ultrahigh discharge capacity but also capture CO
2
and turn it into renewable energy. Their electrochemical reaction pathways' ambiguity, however, creates a hurdle for their practical application. This study used copper selenide (CuSe) nanosheets as the air cathode medium in an environmental transmission electron microscope to in situ study Li–CO
2
/O
2
(mix CO
2
as well as O
2
at a volume ratio of 1:1) and Li–O
2
batteries as well as Li–CO
2
batteries. Primary discharge reactions take place successively in the Li–CO
2
/O
2
–CuSe nanobattery: (I) 4Li
+
+ O
2
+ 4e
−
→ 2Li
2
O; (II) Li
2
O + CO
2
→ Li
2
CO
3
. The charge reaction proceeded via (III) 2Li
2
CO
3
→ 4Li
+
+ 2CO
2
+ O
2
+ 4e
−
. However, Li–O
2
and Li–CO
2
nanobatteries showed poor cycling stability, suggesting the difficulty in the direct decomposition of the discharge product. The fluctuations of the Li–CO
2
/O
2
battery's electrochemistry were also shown to depend heavily on O
2
. The CuSe‐based Li–CO
2
/O
2
battery showed exceptional electrochemical performance. The Li–CO
2
/O
2
battery offered a discharge capacity apex of 15,492 mAh g
−1
and stable cycling 60 times at 100 mA g
−1
. Our research offers crucial insight into the electrochemical behavior of Li–CO
2
/O
2
, Li–O
2
, and Li–CO
2
nanobatteries, which may help the creation of high‐performance Li–CO
2
/O
2
batteries for energy storage applications.
Sprache
Englisch
Identifikatoren
ISSN: 2637-9368
eISSN: 2637-9368
DOI: 10.1002/cey2.424
Titel-ID: cdi_crossref_primary_10_1002_cey2_424
Format
–
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