JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Haonan Yue,Mengwei Han,Xinni Li,Ting Song,Yong Pei,Xianyou Wang,Xiongwei Wu,Tengfei Duan,Bei Long
The development of a low-cost, high-capacity, and insertion-type anode is key for promoting “rocking chair” zinc-ion batteries. Herein, commercial Bi 2 O 3 (BiO) particles are transformed into Bi 2 O 2 Se@Bi 4 O 8 Se (BiOSe) nanosheets through a simple selenylation process. The change in morphology from commercial BiO particle to BiOSe nanosheet leads to an increased specific surface area of the material. The enhanced electronic/ionic conductivity results in its excellent electrochemical kinetics. Ex situ XRD and XPS tests prove the intercalation-type mechanism of BiO and BiOSe as well as the superior electrochemical reversibility of BiOSe compared to BiO. Furthermore, the H + /Zn 2+ co-insertion mechanism of BiOSe is revealed. This makes BiOSe to have low discharge plateaus of 0.38/0.68 V, a high reversible capacity of 182 mA h g −1 at 0.1 A g −1 , and a long cyclic life of 500 cycles at 1 A g −1 . Besides, the BiOSe//MnO 2 “rocking chair” zinc-ion battery offers a high capacity of ≈90 mA h g −1 at 0.2 A g −1 . This work provides a reference for turning commercial material into high-performance anode for “rocking chair” zinc-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Journal of Nanomaterials
·
2019
·Vol. 2019
·期 1
·5290496
·
IF 2.233
Zhenzhu Yu,Fei Nan,Lu Su,Shaofei Zhang,Yan He
Intercalation and exfoliation are key steps in the preparation of graphene by thermal exfoliation, and they determine the quality of the final product. Therefore, it is important to explore the influence of intercalation agents on the intercalation and exfoliation of graphite. In this article, ammonium bicarbonate is intercalated into graphite with different degrees of oxidation to form a graphite intercalation compound (GIC) by means of ultrasound and stirring. Then, they are exfoliated by being heated at high temperatures. After ammonium bicarbonate intercalation and heating treatment, XRD, TG, and BET show that the intercalation and exfoliation effect of graphite oxide (GO) is better than that of graphite (G) and expanded graphite (EG). The intercalation mechanism is that the ammonia molecule in ammonium bicarbonate solution contains a wedge-shaped structure and active point, which provides empty orbits for graphite electrons and forms edge intercalation through physical interaction at the same time.
研究领域:
材料科学
·
纳米材料
·
物理化学
·
碳材料
·
功能材料
✓ 已验证
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2018
·Vol. 20
·期 35
·22563-22568
·
IF 3.906
Lu Wu,Ruimin Sun,Fangyu Xiong,Cunyuan Pei,Kang Han,Chen Peng,Yuqi Fan,Wei Yang,Qinyou An,Liqiang Mai
As a typical member of transition-metal dichalcogenides (TMDs), VS2 has been evaluated as the aluminum-ion battery cathode for the first time. To further improve their stability and conductivity, the as-prepared VS2 nanosheets are modified with graphene (denoted as G-VS2). And the G-VS2 electrode delivers a high initial discharge capacity of 186 mA h g−1 at 100 mA g−1 with almost 100% coulombic efficiency after 50 cycles. Furthermore, an explicit intercalation mechanism of Al into G-VS2 has been investigated by in/ex situ XRD, ex situ Raman and TEM spectroscopy. And the G-VS2 composite proves to be an impressive cathode material for aluminum-ion batteries (AIBs). This work might put forward the application of TMDs in AIBs.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
·
固体物理
✓ 已验证
DOI
高影响因子
Nano Energy
·
2020
·
IF 16.602
Lingli Xing,Kwadwo Asare Owusu,Xinyu Liu,Jiashen Meng,Kun Wang,Qinyou An,Liqiang Mai
As promising electrode materials for aluminum-ion batteries (AIBs), transition metal sulfides have attracted significant attention. However, the relative low energy density and poor rate property restrict their further applications. Herein, channels-rich VS 4 nanowire clusters were synthesized via an amine ions-assisted method. When assessed as a cathode for rechargeable AIB, the VS 4 nanowire clusters exhibit superior electrochemical performances , specifically, outstanding rate property (103.32 mAh g -1 at 800 mA g -1 ), good cycling stability and a high reversible capacity of 252.51 mAh g -1 (at 100 mA g -1 ). Moreover, ex-situ X-ray diffraction (XRD) and in-situ Raman techniques reveal that the as-prepared VS 4 nanowire clusters have stable channels-rich structures, which is favorable for the mass transfer in electrochemical reaction . A mechanism of intercalation is proposed for the electrochemical process . This work takes a step toward the development of high-performance electrode materials for AIBs and provides new insights into the chemistry of AIBs for electrochemical energy storage .
研究领域:
电化学
·
能源材料科学
·
纳米材料学
·
储能技术
·
无机化学
·
材料物理
·
应用化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）