A textile-based SnO2 ultra-flexible electrode for lithium-ion batteries

Abstract

The advancements in wearable electronic devices make it urgent to develop highperformance flexible lithium-ion batteries (LIBs) with excellent mechanical and electrochemical properties. Herein, we design a new 3D hierarchical hybrid sandwich flexible structure by anchoring SnO 2 nanosheets (SnO 2-NSs) on flexible carbon cloth and coating with thin amorphous carbon (AC) layer (CF@SnO 2-NS@AC). The carbon cloth substrate works as the backbone and the current collector, while the thin AC layer provides extra support during the electrode expansion. The new architecture can be utilised as a binder-free electrode and presents extraordinary mechanical flexibility and outstanding electrical stability under external stresses. The new electrode can deliver a specific capacity as high as 968.6 mAh g-1 after 100 cycles at 85 mA g-1 , which also shows remarkable rate capability and an excellent high current cycling stability. The outstanding electrochemical performance combined with the high mechanical flexibility and invariable electrical conductivity during/after different bending cycles make the new structure a promising oxide anode for flexible batteries. With the possibility of using a similar approach to design flexible cathode, the present work opens the door to empower the next-generation wearable devices and smart clothes with a robust and reliable battery.

Free-Standing SnO2@rGO Anode via the Anti-solvent-assisted Precipitation for Superior Lithium Storage Performance

“…Characteristic C 1s, Sn 3d, and O 1s XPS peaks are plotted in Figures 3d-f, respectively. According to fitting patterns, the C 1s peak can be deconvoluted to one dominant C=C contribution at 284.7 eV, together with two weak effects from the C-O at 285.2 eV and C=O at 286.5 eV (Figure 3d), indicating a typical chemical environment of the rGO component as reported in the literature (Min et al, 2019). FIGURE 2 | Morphologic and structural characteristics of resulting SnO 2 @rGO composite material: SEM images of (a) the side view and (b) the top view, (c) zoom-in FESEM image in comparison with (d) the original SnO 2 @GO material before the reduction, (e) TEM image, (f) HRTEM image, coupled with (f I ) SAED pattern and (f II -f IV ) enlarged lattice fringes as squared in red, pink and navy dashed lines, respectively.…”

“…However, the practical application of SnO 2 -based anode materials is impeded by severe volumetric expansion/contraction up to 259% during alloying/dealloying processes of Sn x Li variants, leading to the structural degradation and poor electronic conductivity of the anode. Additionally, the undesirable aggregation of reduced Sn nanoparticles into clusters together with the Sn pulverization occurs during prolonged electrochemical cycling, which further brings about the deactivation of active Sn particles, and thus the rapid capacity loss and poor cycling stability (Li et al, 2015;Liu et al, 2015;Min et al, 2019).…”

Construction of 2D‐ZnS@ZnO Z‐Scheme Heterostructured Nanosheets with a Highly Ordered ZnO Core and Disordered ZnS Shell for Enhancing Photocatalytic Hydrogen Evolution

“…Formation of heterostructure, especially Z‐scheme semiconductor heterostructure, is an effectively way to promote the separation of charge carriers and remain efficient redox process, thereby promoting the photocatalytic activity . The valence band (VB) structure of ZnO and ZnS can be well matched to form a Z‐scheme heterostructure.…”

“…Formation of heterostructure, especially Z-scheme semiconductor heterostructure, is an effectively way to promote the separation of charge carriers and remain efficient redox process, thereby promoting the photocatalytic activity. [15][16]17,18,19] The valence band (VB) structure of ZnO and ZnS can be well matched to form a Z-scheme heterostructure. Actually, the conduction band (CB) edge potential of ZnO is À 0.31 eV, which is not negative enough to photocatalytic hydrogen production.…”

Korning Cam ve Si Alttaşlar Üzerine RF Magnetron Püskürtme ile Büyütülen SnO2 İnce Filmlerin Derinlik Profil Analizi

“…Kalay Oksit (SnO2) ince filmler, üstün elektro-optik, kimyasal kararlılık ve yapısal özelliklerden dolayı geniş ilgi gören yarıiletken malzemelerden biridir. 3.8 eV gibi geniş bir enerji bant aralığına sahip SnO2 filmleri; gaz sensörleri, biyosensörler, düşük emisyonlu kaplamalar, fotoiletkenler, şeffaf iletken elektrotlar, güneş hücreleri ve Lityum iyon pilleri gibi birçok aygıtın geliştirilmesinde kullanılan nitelikli nanoteknolojik bir malzemedir [1][2][3][4][5][6][7]. Atomik dağılımlarının derinlik boyunca homojen dağılması, filmlerin fiziksel özgün karakterlerini taşıyabilmeleri açısından son derece önemlidir.…”