Figure 3b. Specific capacity vs. cycle number of microcrystalline tin nitride in a Na half-cell at 200 mA g-1									
Cycle number	Reduction specific capacity (mA h g-1)	Oxidation specific capacity (mA h g-1)	Efficiency						
1	671.75623	214.53308	31.93615						
2	305.86112	215.35065	70.40799						
3	289.38203	229.01776	79.14028						
4	286.49057	239.13642	83.47096						
5	285.24586	246.28814	86.34241						
6	284.92167	252.14728	88.49705						
7	285.10316	256.86479	90.09539						
8	287.22102	261.66175	91.10119						
9	288.11384	265.01831	91.98389						
10	289.55528	268.41563	92.69927						
11	289.74272	270.61913	93.3998						
12	291.20802	273.20532	93.81792						
13	292.11687	275.28911	94.23937						
14	293.40334	277.20575	94.47941						
15	293.66384	278.44622	94.81801						
16	294.62106	279.84524	94.9848						
17	294.96863	281.07612	95.29017						
18	296.69423	282.88175	95.34454						
19	296.51218	283.15632	95.49568						
20	295.65718	283.40605	95.85631						
21	295.73637	283.46036	95.849						
22	295.20494	283.63208	96.07972						
23	296.43345	284.97509	96.13459						
24	294.18926	283.39762	96.33174						
25	294.22663	283.94454	96.50538						
26	292.97098	282.43737	96.40456						
27	290.84264	281.34378	96.73402						
28	290.53629	281.13367	96.7637						
29	289.60145	280.57717	96.8839						
30	288.87077	280.12081	96.97098						
31	287.65968	278.83764	96.93317						
32	286.12536	277.80069	97.09055						
33	284.88652	276.92786	97.20638						
34	284.22084	275.73908	97.01579						
35	281.03617	273.27394	97.238						
36	279.56297	272.32739	97.41182						
37	278.53351	271.19295	97.36457						
38	277.04556	269.99697	97.4558						
39	275.54783	268.49309	97.43974						
40	273.99306	267.08468	97.47863						
41	272.61722	265.74512	97.47921						
42	270.86707	264.26475	97.56253						
43	270.39424	263.60927	97.49071						
44	267.45545	261.10317	97.62492						
45	265.70928	259.34494	97.60477						
46	263.92534	257.59438	97.60123						
47	261.92839	255.79353	97.65781						
48	259.88932	253.84552	97.67447						
49	258.06157	252.23554	97.74239						
50	256.28071	250.45045	97.72505						
