Details

Autor(en) / Beteiligte

• Zhao, Lu‐Kang
• Gao, Xuan‐Wen
• Mu, Jianjia
• Luo, Wen‐Bin
• Liu, Zhaomeng
• Sun, Zhenhua
• Gu, Qin‐Fen
• Li, Feng

Titel

Durable Integrated K‐Metal Anode with Enhanced Mass Transport through Potassiphilic Porous Interconnected Mediator

Ist Teil von

• Advanced functional materials, 2023-10, Vol.33 (41)

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc

Erscheinungsjahr

2023

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Abstract K‐metal batteries have become one of the promising candidates for the large‐scale energy storage owing to the virtually inexhaustible and widely potassium resources. The uneven K + deposition and dendrite growth on the anode causes the batteries prematurely failure to limit the further application. An integrated K‐metal anode is constructed by cold‐rolling K metal with a potassiphilic porous interconnected mediator. Based on the experimental results and theoretical calculations, it demonstrates that the potassiphilic porous interconnected mediator boosts the mass transportation of K‐metal anode by the K affinity enhancement, which decreases the concentration polarization and makes a dendrite‐free K‐metal anode interface. The interconnected porous structure mitigates the internal stress generated during repetitive deposition/stripping, enabling minimized the generation of electrode collapse. As a result, a durable K‐metal anode with excellent cycling ability of exceed 1, 000 h at 1 mA cm −2 /1 mAh cm −2 and lower polarization voltage in carbonate electrolyte is obtained. This proposed integrated anode with fast K + kinetics fabricated by a repeated cold rolling and folding process provides a new avenue for constructing a high‐performance dendrites‐free anode for K‐metal batteries.