Details

Autor(en) / Beteiligte

• Yuan, Jujun
• Li, Xiaofan
• Li, Haixia
• Lai, Weidong
• Gan, Yunfei
• Yang, Jianwen
• Zhang, Xianke
• Liu, Jun
• Zhu, Xiurong
• Li, Xiaokang

Titel

Fabrication of ZnSe/C Hollow Polyhedrons for Lithium Storage

Ist Teil von

• Chemistry : a European journal, 2021-10, Vol.27 (60), p.14989-14995

Ort / Verlag

Weinheim: Wiley Subscription Services, Inc

Erscheinungsjahr

2021

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• ZnSe has got extensive attention for high‐performance LIBs anode due to its remarkable theoretical capacity and environmental friendliness. Nevertheless, the large volume variation for the ZnSe in the discharge/charge processes brings about rapid capacity fading and poor rate performance. Herein, ZnSe/C hollow polyhedrons are successfully synthesized by selenization of zeolitic imidazolate framework‐8 (ZIF‐8) with resorcinol‐formaldehyde (RF) coating. The protection of C layer derived from RF coating layer and Ostwald ripening during the process of selenization play important roles in promoting formation of ZnSe/C hollow polyhedrons. The ZnSe/C hollow polyhedrons exhibit good rate performance and long‐term cycle stability (345 mAh g−1 up to 1000 cycles at 1 A g−1) for lithium ion batteries (LIBs) anode. The improved electrochemical performance is benefit from the unique ZnSe/C hollow structure, in which the hollow structure can effectively avoid terrible volume expansion, and the thin ZnSe/C shell can not only provide adequate diffusion paths of lithium ions and but also enhance the electronic conductivity. ZnSe/C hollow polyhedrons are successfully synthesized by selenization of zeolitic imidazolate framework‐8 (ZIF‐8) with resorcinol‐formaldehyde (RF) coating. The protection of C layer derived from RF coating layer and Ostwald ripening during the process of selenization play important roles in promoting formation of ZnSe/C hollow polyhedrons. As lithium ion batteries anode, the ZnSe/C hollow polyhedrons exhibit good rate performance and long‐term cycle stability.