2022
DOI: 10.1021/acsnano.2c05561
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Balanced Crystallinity and Nanostructure for SnS2 Nanosheets through Optimized Calcination Temperature toward Enhanced Pseudocapacitive Na+ Storage

Abstract: Sodium ion batteries (SIBs) are expected to take the place of lithium ion batteries (LIBs) as next-generation electrochemical energy storage devices due to the cost advantages they offer. However, due to the larger ion radius, the reaction kinetics of Na+ in anode materials is sluggish. SnS2 is an attractive anode material for SIBs due to its large interlayer spacing and alloying reactions with high capacity. Calcination is usually employed to improve the crystallinity of SnS2, which could affect the Na+ react… Show more

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Cited by 38 publications
(18 citation statements)
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“…The Na + diffusion coefficient can be calculated from the Fick's second law by using eq S1. 49,50 gradually decrease during the alloying and dealloying reactions. 40,51 The Bi@NPC-850-U electrode owns the highest Na + diffusion coefficient in four anodes, indicating the fastest reaction kinetics, thus exhibiting outstanding electrochemical performance especially at a high current rate.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
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“…The Na + diffusion coefficient can be calculated from the Fick's second law by using eq S1. 49,50 gradually decrease during the alloying and dealloying reactions. 40,51 The Bi@NPC-850-U electrode owns the highest Na + diffusion coefficient in four anodes, indicating the fastest reaction kinetics, thus exhibiting outstanding electrochemical performance especially at a high current rate.…”
Section: ■ Results and Discussionmentioning
confidence: 99%
“…The corresponding curves were obtained in the third cycle at a current pulse of 0.1 A g –1 for 10 min with a rest for 30 min to reach a quasi-equilibrium potential (Figure a). The Na + diffusion coefficient can be calculated from the Fick’s second law by using eq S1. , Figure b,c shows the changing processes of the Na + diffusion coefficient during the discharging and charging processes, respectively. The calculated values of D Na+ range from 10 –12 to 10 –9.5 cm 2 s –1 and present the similar changing trend, that is the D Na+ values gradually decrease during the alloying and dealloying reactions. , The Bi@NPC-850-U electrode owns the highest Na + diffusion coefficient in four anodes, indicating the fastest reaction kinetics, thus exhibiting outstanding electrochemical performance especially at a high current rate.…”
Section: Resultsmentioning
confidence: 99%
“…In fact, the stronger the diffraction peaks for each crystal plane, the more uniform the orientation of the grains. 37 We calculated the relative crystallinity of PTCDA, PTCDA(Ss), and PTCDA(G) three samples, as shown in Figure 2. The calculated results of the relative crystallinity of the three samples (PTCDA, PTCDA-(Ss), and PTCDA(G)) were 0.86, 0.92, and 0.91, respectively.…”
Section: Resultsmentioning
confidence: 99%
“…Unfortunately, SnS 2 -based anodes still suffer from several drawbacks that hinder their applications, including poor conductivity, rapid capacity decay, and low material utilization rate. 6,7 The introduction of highly electrically conductive phases and the creation of lattice boundary/interfaces to accelerate the Na + /e À diffusion have proven to be effective ways to address these problems. 8,9 In SnS 2 , Sn displays its highest valence state and S its lowest-and crystal boundary/interfaces may be formed here by redox reactions, with transition metals serving as suitable reductants.…”
mentioning
confidence: 99%
“…Unfortunately, SnS 2 -based anodes still suffer from several drawbacks that hinder their applications, including poor conductivity, rapid capacity decay, and low material utilization rate. 6,7…”
mentioning
confidence: 99%