Details

Autor(en) / Beteiligte

• Liu, Huan
• Xin, Zijun
• Cao, Bin
• Xu, Zhijing
• Xu, Bin
• Zhu, Qizhen
• Yang, Jin‐Lin
• Zhang, Bao
• Fan, Hong Jin

Titel

Polyhydroxylated Organic Molecular Additives for Durable Aqueous Zinc Battery

Ist Teil von

• Advanced functional materials, 2024-01, Vol.34 (4), p.n/a

Ort / Verlag

Hoboken: Wiley Subscription Services, Inc

Erscheinungsjahr

2024

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• The large‐scale deployment of aqueous Zn‐ion batteries is hindered by Zn anode instability including surface corrosion, hydrogen gas evolution, and irregular Zn deposition. To tackle these challenges, a polyhydroxylated organic molecular additive, trehalose, is incorporated to refine the solvation structure and promote planar Zn deposition. Within solvation structure regions involving trehalose, the hydroxy groups participate in the reconstruction of hydrogen bond networks, which increases the overpotential for water decomposition reaction. Moreover, at the Zn metal–molecule interface, the chemisorption of trehalose onto the surface of the zinc anode enhances corrosion resistance and facilitates the deposition of zinc in a planar manner. The optimized electrolyte significantly improves Zn striping/plating reversibility and maintains stable potentials over 1600 h at 5 mA cm−2 with a cutoff capacity of 1 mA h cm−2 in symmetric cells. When combined with the MnO2 cathode, the assembled coin cell retains ≈89% of its capacity after 1000 cycles. This organic molecule additive, emphasizing the role of polyhydroxylated organic molecules in fine‐tuning solvation structures and anode/electrolyte interfaces, holds promise for enhancing various aqueous metal batteries. Trehalose, a widely used moisturizer, preservative, and stabilizer in the food industry, is proven to be an effective electrolyte additive to the sulfite electrolyte for aqueous zinc ion battery. It optimizes the solvation structure by decreasing free water molecules and forming hydrogen bond networks. Trehalose also stabilizes the metal‐electrolyte interface through chemisorption, benefiting planar zinc deposition and suppressing dendrite growth.