| Autor: |
Bosubabu, Dasari, Ramakumar, Sampathkumar, Jeevanantham, Sivaraj, Kanagaraj, Inthumathi, Bhargav, Pamula Balaji, Ahmed, Nafis, Ramesha, Kannadka |
| Předmět: |
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| Zdroj: |
Batteries & Supercaps; Nov2022, Vol. 5 Issue 11, p1-9, 9p |
| Abstrakt: |
Lithium‐sulfur (Li−S) batteries are attractive owing to their high energy density and cost‐effectiveness. However, the practical application of Li−S batteries is hindered by uncontrollable lithium dendrite growth and severe polysulfide shuttling during cycling. Here, we fabricated 100 nm thin SiO2 decorated on carbon cloth (SiO2@CC). It is observed that in‐situ lithiation of SiO2 forms a highly lithiophilic LixSiOy layer over SiO2 which further acts as an efficient host for dendrite‐free lithium metal deposition. So lithiated SiO2@CC shows high affinity for homogenous growth of Li while the carbon fibers control the volume change during the deposition/stripping process. Hence, the synergistic effect of LixSiOy layer and carbon cloth (CC) effectively suppresses dendritic Li growth. As a result, the symmetric cell exhibits an ultra‐stable cycling performance over 1000 h with a low overpotential of <25 mV even at a high current density of 1 mA cm−2. Further, the lithiated SiO2@CC is used as a lithium metal‐free anode (also a flexible electrode) for Li−S battery, which exhibits a stable capacity of 800 mAh g−1 over 500 cycles due to its unique structural properties. This work offers new insights and paves the way for developing dendrite‐free, high‐performance Li−S battery technology. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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