Details

Autor(en) / Beteiligte

• Cheng, Zengzhong
• Wu, Meifen
• Jin, Jun
• Lu, Yan
• Wen, Zhaoyin

Titel

A highly stable Li metal anode enabled by -SO3− group modification for high energy rechargeable Li metal batteries

Ist Teil von

• Electrochimica acta, 2023-10, Vol.464, p.142880, Article 142880

Ort / Verlag

Elsevier Ltd

Erscheinungsjahr

2023

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •A modified layer enriched with -SO3− groups can be introduced onto metallic Li.•The -SO3− group modification layer can realize dendrite-suppression capability.•CSA-Li anode shows stable polarization voltage and excellent cycling stability. Lithium metal battery is regarded as an effective way to realize high energy storage. Nevertheless, the development of metallic Li is greatly restricted by the unbridled growth of dendrites on the surface. Interfacial modification has been recognized as the most direct and useful method to alleviate dendritic growth. In this work, camphorsulfonic acid has been used to treat metallic Li, and a uniform modification layer rich in -SO3− group has been generated on the surface of metallic Li (CSA-Li). With the high polarity of -SO3− group, the lithiophilicity of CSA-Li has been greatly enhanced, leading to the desirable homogeneous deposition of lithium. Impressively, with a constant polarization voltage of 8 mV, the CSA-Li//CSA-Li symmetric cell can cycle steadily for 1300 h. Both the CSA-Li//LFP and the CSA-Li//NCM full cells show stable polarization voltage and great cycling stability, and the capacity retention rates have been greatly upgraded. Excellent CEs are also achieved in CSA-Li//NCM811 full cell at 1.0 C (average CE of 99.1%) and CSA-Li//NCM622 full cell at 0.5 C (average CE of 99.1%). In addition, after 300 cycles, the CE of the CSA-Li//S cell is 93.69%, which is significantly higher than the 85.45% of the Li//S cell. This work gives an immediate and useful method for protecting metallic Li anodes. [Display omitted]