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In Situ Visualization of Structural Evolution and Fissure Breathing in (De)lithiated H2V3O8 Nanorods AITranslate

Yi Wu; Xiaoming Xu; Chongyang Zhu; Pengcheng Liu; Shize Yang; Huolin L. Xin; Ran Cai; Libing Yao; Meng Nie; Shuangying Lei; Peng Gao; Litao Sun; Liqiang Mai; Feng Xu;
Southeast University; Wuhan University of Technology; Southeast University; The University of Texas at Austin; Brookhaven National Laboratory; University of California; Southeast University; Southeast University; Southeast University; Southeast University; Peking University; Southeast University; Wuhan University of Technology; Southeast University
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Abstract AITranslate

Layered H2V3O8 material consisting of V3O8 layers features the elastic space for buffering volume change upon repeated ion (de)intercalations. However, its ion transport and phase transformations still remain largely unknown due to lack of direct evidence. Here we employ in situ transmission electron microscopy to revisit this material carefully. Upon lithiation, the localized phase transformation from H2V3O8 to V2O3 via an intermediate VO2 phase was observed, and large structural fissures gradually formed. Unexpectedly, the large fissures were able to self-heal during delithiation with the VO2 phase as the delithiated product. The fissures could appear and disappear alternately upon subsequent (de)lithiation, in which a stable and reversible phase transformation between V2O3 and VO2 phases was established. These unreported findings are expected to call for renewed attention to this electrode material for a more comprehensive understanding in rechargeable metal-ion batteries.

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DOI：https://doi.org/10.1021/acsenergylett.9b01381

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Citation Information:

Layered H2V3O8 material consisting of V3O8 layers features the elastic space for buffering volume change upon repeated ion (de)intercalations. However, its ion transport and phase transformations still remain largely unknown due to lack of direct evidence. Here we employ in situ transmission electron microscopy to revisit this material carefully. Upon lithiation, the localized phase transformation from H2V3O8 to V2O3 via an intermediate VO2 phase was observed, and large structural fissures gradually formed. Unexpectedly, the large fissures were able to self-heal during delithiation with the VO2 phase as the delithiated product. The fissures could appear and disappear alternately upon subsequent (de)lithiation, in which a stable and reversible phase transformation between V2O3 and VO2 phases was established. These unreported findings are expected to call for renewed attention to this electrode material for a more comprehensive understanding in rechargeable metal-ion batteries.

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GB/T 7714-2015 [1] Yi Wu, Xiaoming Xu, Chongyang Zhu, et al. ACS Energy Letters, 2019(4). DOI:10.1021/acsenergylett.9b01381.
MLA [1] Yi Wu, et al., ACS Energy Letters, no. 4, 2019, https://doi.org/10.1021/acsenergylett.9b01381.
APA [1] Yi Wu, Xiaoming Xu, Chongyang Zhu, Pengcheng Liu, Shize Yang, Huolin L. Xin, Ran Cai, Libing Yao, Meng Nie, Shuangying Lei, Peng Gao, Litao Sun, Liqiang Mai, & Feng Xu. (2019). ACS Energy Letters(4). https://doi.org/10.1021/acsenergylett.9b01381
IEEE [1] Yi Wu, Xiaoming Xu, Chongyang Zhu, Pengcheng Liu, Shize Yang, Huolin L. Xin, Ran Cai, Libing Yao, Meng Nie, Shuangying Lei, Peng Gao, Litao Sun, Liqiang Mai, and Feng Xu, ACS Energy Letters, no. 4, 2019, doi: 10.1021/acsenergylett.9b01381.