Metal-coordination chemistry guiding preferred crystallographic orientation for reversible zinc anode

作者：Qiu, Meijia; Sun, Peng; Qin, Aimiao; Cui, Guofeng^*; Mai, Wenjie

来源：Energy Storage Materials, 2022, 49: 463-470.

DOI：10.1016/j.ensm.2022.04.018

• Metal-coordination chemistry
• Texture modification
• Stable Zn anode

The long-term reversible plating/stripping of Zn anodes is one of the decisive parts inside various Zn based aqueous batteries, but originally restricted by irregular dendrite/by-products issues. Guided by the metal-coordination chemistry, a novel additive, sorbitol (SBT), is introduced into the traditional ZnSO4 electrolyte to achieve preferred (002) orientation growth with stably invertible Zn deposition, while modulate the primary solvation structure for Zn2+ through expelling some active H2O molecules to alleviate common side reactions, simultanously. The robust Zn2+-SBT compound enables a much weaker interaction with (002) than (100) and (101), inducing its slower growth and resulting in its ultimate exposure. With a lower surface energy, the primary (002) on Zn anode surface effectively impedes the occurrence of Zn dendrite and several by-products. Excellent stabilities have finally been realized in Zn-Zn symmetric cells and several kinds of full cells, elucidating its potential in future Zn based devices.

• 单位
  中山大学; 桂林理工大学